21021111123232 has 96 divisors (see below), whose sum is σ = 47527463007360. Its totient is φ = 9058731601920.

The previous prime is 21021111123227. The next prime is 21021111123281. The reversal of 21021111123232 is 23232111112012.

It is a happy number.

It is a super-2 number, since 2×21021111123232² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10574007 + ... + 12403702.

It is an arithmetic number, because the mean of its divisors is an integer number (495077739660).

Almost surely, 2^{21021111123232} is an apocalyptic number.

21021111123232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021111123232 is an abundant number, since it is smaller than the sum of its proper divisors (26506351884128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021111123232 is a wasteful number, since it uses less digits than its factorization.

21021111123232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22977866 (or 22977858 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21021111123232 its reverse (23232111112012), we get a palindrome (44253222235244).

The spelling of 21021111123232 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred thirty-two".