121990122 has 12 divisors (see below), whose sum is σ = 264311970. Its totient is φ = 40663368.

The previous prime is 121990109. The next prime is 121990133. The reversal of 121990122 is 221099121.

It can be written as a sum of positive squares in only one way, i.e., 116186841 + 5803281 = 10779^2 + 2409^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3388597 + ... + 3388632.

Almost surely, 2^121990122 is an apocalyptic number.

121990122 is an abundant number, since it is smaller than the sum of its proper divisors (142321848).

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

121990122 is a wasteful number, since it uses less digits than its factorization.

121990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6777237 (or 6777234 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 121990122 is about 11044.9138520859. The cubic root of 121990122 is about 495.9541803191.

The spelling of 121990122 in words is "one hundred twenty-one million, nine hundred ninety thousand, one hundred twenty-two".