103521161990 has 128 divisors (see below), whose sum is σ = 205023329280. Its totient is φ = 37498982400.

The previous prime is 103521161981. The next prime is 103521162007. The reversal of 103521161990 is 99161125301.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 125784719 + ... + 125785541.

It is an arithmetic number, because the mean of its divisors is an integer number (1601744760).

Almost surely, 2^103521161990 is an apocalyptic number.

103521161990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

103521161990 is a deficient number, since it is larger than the sum of its proper divisors (101502167290).

103521161990 is a wasteful number, since it uses less digits than its factorization.

103521161990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 14580, while the sum is 38.

The spelling of 103521161990 in words is "one hundred three billion, five hundred twenty-one million, one hundred sixty-one thousand, nine hundred ninety".