102011202090 has 64 divisors (see below), whose sum is σ = 310891288320. Its totient is φ = 23316845760.

The previous prime is 102011202089. The next prime is 102011202107. The reversal of 102011202090 is 90202110201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26985201 + ... + 26988980.

It is an arithmetic number, because the mean of its divisors is an integer number (4857676380).

Almost surely, 2^102011202090 is an apocalyptic number.

102011202090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102011202090 is an abundant number, since it is smaller than the sum of its proper divisors (208880086230).

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

102011202090 is a wasteful number, since it uses less digits than its factorization.

102011202090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53974204 (or 53974198 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 102011202090 its reverse (90202110201), we get a palindrome (192213312291).

The spelling of 102011202090 in words is "one hundred two billion, eleven million, two hundred two thousand, ninety".