121551031 has 16 divisors (see below), whose sum is σ = 147281920. Its totient is φ = 98094240.

The previous prime is 121551029. The next prime is 121551041. The reversal of 121551031 is 130155121.

It is a cyclic number.

It is not a de Polignac number, because 121551031 - 2¹ = 121551029 is a prime.

It is a super-2 number, since 2×121551031² = 29549306274325922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121551041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (9205120).

Almost surely, 2^121551031 is an apocalyptic number.

121551031 is a deficient number, since it is larger than the sum of its proper divisors (25730889).

121551031 is a wasteful number, since it uses less digits than its factorization.

121551031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15214.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 121551031 is about 11025.0184126830. The cubic root of 121551031 is about 495.3584194595.

The spelling of 121551031 in words is "one hundred twenty-one million, five hundred fifty-one thousand, thirty-one".