102091012 has 6 divisors (see below), whose sum is σ = 178659278. Its totient is φ = 51045504.

The previous prime is 102091007. The next prime is 102091021. The reversal of 102091012 is 210190201.

It can be written as a sum of positive squares in only one way, i.e., 102090816 + 196 = 10104^2 + 14^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12761373 + ... + 12761380.

Almost surely, 2^102091012 is an apocalyptic number.

It is an amenable number.

102091012 is a deficient number, since it is larger than the sum of its proper divisors (76568266).

102091012 is a wasteful number, since it uses less digits than its factorization.

102091012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25522757 (or 25522755 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 102091012 is about 10104.0096991244. The cubic root of 102091012 is about 467.3717981847.

The spelling of 102091012 in words is "one hundred two million, ninety-one thousand, twelve".