21035233212 has 24 divisors (see below), whose sum is σ = 56093955456. Its totient is φ = 6010066608.

The previous prime is 21035233199. The next prime is 21035233223. The reversal of 21035233212 is 21233253012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125209638 + ... + 125209805.

It is an arithmetic number, because the mean of its divisors is an integer number (2337248144).

Almost surely, 2^21035233212 is an apocalyptic number.

It is an amenable number.

21035233212 is an abundant number, since it is smaller than the sum of its proper divisors (35058722244).

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

21035233212 is a wasteful number, since it uses less digits than its factorization.

21035233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250419457 (or 250419455 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 21035233212 its reverse (21233253012), we get a palindrome (42268486224).

The spelling of 21035233212 in words is "twenty-one billion, thirty-five million, two hundred thirty-three thousand, two hundred twelve".