121257102 has 16 divisors (see below), whose sum is σ = 242882640. Its totient is φ = 40357632.

The previous prime is 121257083. The next prime is 121257121. The reversal of 121257102 is 201752121.

It is an interprime number because it is at equal distance from previous prime (121257083) and next prime (121257121).

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, 10977 + ... + 19052.

It is an arithmetic number, because the mean of its divisors is an integer number (15180165).

Almost surely, 2^121257102 is an apocalyptic number.

121257102 is an abundant number, since it is smaller than the sum of its proper divisors (121625538).

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

121257102 is a wasteful number, since it uses less digits than its factorization.

121257102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30707.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 121257102 is about 11011.6802532584. The cubic root of 121257102 is about 494.9588130204.

The spelling of 121257102 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, one hundred two".