1012112221021 has 16 divisors (see below), whose sum is σ = 1106021288448. Its totient is φ = 918520138800.

The previous prime is 1012112220989. The next prime is 1012112221031. The reversal of 1012112221021 is 1201222112101.

It is not a de Polignac number, because 1012112221021 - 2⁵ = 1012112220989 is a prime.

It is a super-2 number, since 2×1012112221021² (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 = 1012112220986 and 1012112221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012112221031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64692826 + ... + 64708468.

It is an arithmetic number, because the mean of its divisors is an integer number (69126330528).

Almost surely, 2^{1012112221021} is an apocalyptic number.

1012112221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012112221021 is a deficient number, since it is larger than the sum of its proper divisors (93909067427).

1012112221021 is a wasteful number, since it uses less digits than its factorization.

1012112221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25392.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1012112221021 its reverse (1201222112101), we get a palindrome (2213334333122).

It can be divided in two parts, 101211 and 2221021, that added together give a palindrome (2322232).

The spelling of 1012112221021 in words is "one trillion, twelve billion, one hundred twelve million, two hundred twenty-one thousand, twenty-one".