21010012202104 has 64 divisors (see below), whose sum is σ = 42549454936800. Its totient is φ = 9688783663104.

The previous prime is 21010012202089. The next prime is 21010012202111. The reversal of 21010012202104 is 40120221001012.

It is a super-2 number, since 2×21010012202104² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4198732 + ... + 7723300.

Almost surely, 2^{21010012202104} is an apocalyptic number.

It is an amenable number.

21010012202104 is an abundant number, since it is smaller than the sum of its proper divisors (21539442734696).

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

21010012202104 is a wasteful number, since it uses less digits than its factorization.

21010012202104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525472 (or 3525468 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21010012202104 its reverse (40120221001012), we get a palindrome (61130233203116).

The spelling of 21010012202104 in words is "twenty-one trillion, ten billion, twelve million, two hundred two thousand, one hundred four".