122135015990 has 16 divisors (see below), whose sum is σ = 236754031248. Its totient is φ = 45096005856.

The previous prime is 122135015957. The next prime is 122135016049. The reversal of 122135015990 is 99510531221.

It is a congruent number.

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, 469749932 + ... + 469750191.

It is an arithmetic number, because the mean of its divisors is an integer number (14797126953).

Almost surely, 2^122135015990 is an apocalyptic number.

122135015990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122135015990 is a deficient number, since it is larger than the sum of its proper divisors (114619015258).

122135015990 is a wasteful number, since it uses less digits than its factorization.

122135015990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939500143.

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 122135015990 in words is "one hundred twenty-two billion, one hundred thirty-five million, fifteen thousand, nine hundred ninety".