121550142 has 32 divisors (see below), whose sum is σ = 279014400. Its totient is φ = 34580448.

The previous prime is 121550123. The next prime is 121550159. The reversal of 121550142 is 241055121.

It is a super-3 number, since 3×121550142³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3984 + ... + 16092.

It is an arithmetic number, because the mean of its divisors is an integer number (8719200).

Almost surely, 2^121550142 is an apocalyptic number.

121550142 is an abundant number, since it is smaller than the sum of its proper divisors (157464258).

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

121550142 is a wasteful number, since it uses less digits than its factorization.

121550142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121550142 is about 11024.9780952163. The cubic root of 121550142 is about 495.3572118056.

The spelling of 121550142 in words is "one hundred twenty-one million, five hundred fifty thousand, one hundred forty-two".