1011000222221 has 4 divisors (see below), whose sum is σ = 1102909333344. Its totient is φ = 919091111100.

The previous prime is 1011000222187. The next prime is 1011000222257. The reversal of 1011000222221 is 1222220001101.

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 1011000222221 - 2⁶ = 1011000222157 is a prime.

It is a super-2 number, since 2×1011000222221² (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 = 1011000222196 and 1011000222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011000222521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45954555545 + ... + 45954555566.

It is an arithmetic number, because the mean of its divisors is an integer number (275727333336).

Almost surely, 2^{1011000222221} is an apocalyptic number.

1011000222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011000222221 is a deficient number, since it is larger than the sum of its proper divisors (91909111123).

1011000222221 is an equidigital number, since it uses as much as digits as its factorization.

1011000222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91909111122.

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

Adding to 1011000222221 its reverse (1222220001101), we get a palindrome (2233220223322).

The spelling of 1011000222221 in words is "one trillion, eleven billion, two hundred twenty-two thousand, two hundred twenty-one".