21102022002004 has 36 divisors (see below), whose sum is σ = 38247833162644. Its totient is φ = 10185061896576.

The previous prime is 21102022001941. The next prime is 21102022002029. The reversal of 21102022002004 is 40020022020112.

It can be written as a sum of positive squares in 2 ways, for example, as 8089769439504 + 13012252562500 = 2844252^2 + 3607250^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15712419 + ... + 17002474.

Almost surely, 2^{21102022002004} is an apocalyptic number.

It is an amenable number.

21102022002004 is a deficient number, since it is larger than the sum of its proper divisors (17145811160640).

21102022002004 is a wasteful number, since it uses less digits than its factorization.

21102022002004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32715064 (or 32715015 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21102022002004 its reverse (40020022020112), we get a palindrome (61122044022116).

The spelling of 21102022002004 in words is "twenty-one trillion, one hundred two billion, twenty-two million, two thousand, four".