21032301012 has 12 divisors (see below), whose sum is σ = 49075369056. Its totient is φ = 7010767000.

The previous prime is 21032301007. The next prime is 21032301023. The reversal of 21032301012 is 21010323012.

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

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21032300982 and 21032301000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876345864 + ... + 876345887.

It is an arithmetic number, because the mean of its divisors is an integer number (4089614088).

Almost surely, 2^21032301012 is an apocalyptic number.

It is an amenable number.

21032301012 is an abundant number, since it is smaller than the sum of its proper divisors (28043068044).

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

21032301012 is a wasteful number, since it uses less digits than its factorization.

21032301012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752691758 (or 1752691756 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21032301012 its reverse (21010323012), we get a palindrome (42042624024).

The spelling of 21032301012 in words is "twenty-one billion, thirty-two million, three hundred one thousand, twelve".