21101915226 has 16 divisors (see below), whose sum is σ = 48232949184. Its totient is φ = 6029118624.

The previous prime is 21101915201. The next prime is 21101915239. The reversal of 21101915226 is 62251910112.

It is a junction number, because it is equal to n+sod(n) for n = 21101915193 and 21101915202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251213235 + ... + 251213318.

It is an arithmetic number, because the mean of its divisors is an integer number (3014559324).

Almost surely, 2^21101915226 is an apocalyptic number.

21101915226 is an abundant number, since it is smaller than the sum of its proper divisors (27131033958).

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

21101915226 is a wasteful number, since it uses less digits than its factorization.

21101915226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502426565.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 21101915226 in words is "twenty-one billion, one hundred one million, nine hundred fifteen thousand, two hundred twenty-six".