1212002110021 has 4 divisors (see below), whose sum is σ = 1219437705952. Its totient is φ = 1204566514092.

The previous prime is 1212002110013. The next prime is 1212002110057. The reversal of 1212002110021 is 1200112002121.

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 1212002110021 - 2³ = 1212002110013 is a prime.

It is a super-2 number, since 2×1212002110021² (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 = 1212002109983 and 1212002110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002110621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3717797721 + ... + 3717798046.

It is an arithmetic number, because the mean of its divisors is an integer number (304859426488).

Almost surely, 2^{1212002110021} is an apocalyptic number.

It is an amenable number.

1212002110021 is a deficient number, since it is larger than the sum of its proper divisors (7435595931).

1212002110021 is an equidigital number, since it uses as much as digits as its factorization.

1212002110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7435595930.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212002110021 its reverse (1200112002121), we get a palindrome (2412114112142).

The spelling of 1212002110021 in words is "one trillion, two hundred twelve billion, two million, one hundred ten thousand, twenty-one".