21001121031032 has 16 divisors (see below), whose sum is σ = 41449580982600. Its totient is φ = 9947899435680.

The previous prime is 21001121031029. The next prime is 21001121031139. The reversal of 21001121031032 is 23013012110012.

It is a self number, because there is not a number n which added to its sum of digits gives 21001121031032.

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, 69082634819 + ... + 69082635122.

Almost surely, 2^{21001121031032} is an apocalyptic number.

It is an amenable number.

21001121031032 is a deficient number, since it is larger than the sum of its proper divisors (20448459951568).

21001121031032 is a wasteful number, since it uses less digits than its factorization.

21001121031032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138165269966 (or 138165269962 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21001121031032 its reverse (23013012110012), we get a palindrome (44014133141044).

The spelling of 21001121031032 in words is "twenty-one trillion, one billion, one hundred twenty-one million, thirty-one thousand, thirty-two".