121421958 has 16 divisors (see below), whose sum is σ = 277536000. Its totient is φ = 34691976.

The previous prime is 121421957. The next prime is 121421959. The reversal of 121421958 is 859124121.

It is an interprime number because it is at equal distance from previous prime (121421957) and next prime (121421959).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121421957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445458 + ... + 1445541.

It is an arithmetic number, because the mean of its divisors is an integer number (17346000).

Almost surely, 2^121421958 is an apocalyptic number.

121421958 is an abundant number, since it is smaller than the sum of its proper divisors (156114042).

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

121421958 is a wasteful number, since it uses less digits than its factorization.

121421958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891011.

The product of its digits is 5760, while the sum is 33.

The square root of 121421958 is about 11019.1632168691. The cubic root of 121421958 is about 495.1830197626.

The spelling of 121421958 in words is "one hundred twenty-one million, four hundred twenty-one thousand, nine hundred fifty-eight".