21021102092 has 6 divisors (see below), whose sum is σ = 36786928668. Its totient is φ = 10510551044.

The previous prime is 21021102079. The next prime is 21021102107. The reversal of 21021102092 is 29020112012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627637758 + ... + 2627637765.

It is an arithmetic number, because the mean of its divisors is an integer number (6131154778).

Almost surely, 2^21021102092 is an apocalyptic number.

It is an amenable number.

21021102092 is a deficient number, since it is larger than the sum of its proper divisors (15765826576).

21021102092 is a wasteful number, since it uses less digits than its factorization.

21021102092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255275527 (or 5255275525 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21021102092 in words is "twenty-one billion, twenty-one million, one hundred two thousand, ninety-two".