21029193012 has 12 divisors (see below), whose sum is σ = 49068117056. Its totient is φ = 7009731000.

The previous prime is 21029192981. The next prime is 21029193013. The reversal of 21029193012 is 21039192012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21029193013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876216364 + ... + 876216387.

Almost surely, 2^21029193012 is an apocalyptic number.

It is an amenable number.

21029193012 is an abundant number, since it is smaller than the sum of its proper divisors (28038924044).

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

21029193012 is a wasteful number, since it uses less digits than its factorization.

21029193012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752432758 (or 1752432756 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

It can be divided in two parts, 210291 and 93012, that added together give a palindrome (303303).

The spelling of 21029193012 in words is "twenty-one billion, twenty-nine million, one hundred ninety-three thousand, twelve".