1002112220021 has 4 divisors (see below), whose sum is σ = 1093213330944. Its totient is φ = 911011109100.

The previous prime is 1002112220003. The next prime is 1002112220063. The reversal of 1002112220021 is 1200222112001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002112220021 - 2²⁶ = 1002045111157 is a prime.

It is a super-2 number, since 2×1002112220021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002112219978 and 1002112220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002112220071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45550555445 + ... + 45550555466.

It is an arithmetic number, because the mean of its divisors is an integer number (273303332736).

Almost surely, 2^{1002112220021} is an apocalyptic number.

1002112220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002112220021 is a deficient number, since it is larger than the sum of its proper divisors (91101110923).

1002112220021 is an equidigital number, since it uses as much as digits as its factorization.

1002112220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91101110922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1002112220021 its reverse (1200222112001), we get a palindrome (2202334332022).

It can be divided in two parts, 100211 and 2220021, that added together give a palindrome (2320232).

The spelling of 1002112220021 in words is "one trillion, two billion, one hundred twelve million, two hundred twenty thousand, twenty-one".