121355031 has 16 divisors (see below), whose sum is σ = 185395968. Its totient is φ = 69168000.

The previous prime is 121355029. The next prime is 121355063. The reversal of 121355031 is 130553121.

It is not a de Polignac number, because 121355031 - 2¹ = 121355029 is a prime.

It is a super-2 number, since 2×121355031² = 29454087098021922, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 121354989 and 121355007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355431) 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, 1216 + ... + 15626.

It is an arithmetic number, because the mean of its divisors is an integer number (11587248).

Almost surely, 2^121355031 is an apocalyptic number.

121355031 is a deficient number, since it is larger than the sum of its proper divisors (64040937).

121355031 is a wasteful number, since it uses less digits than its factorization.

121355031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14822.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 121355031 is about 11016.1259524390. The cubic root of 121355031 is about 495.0920224794.

The spelling of 121355031 in words is "one hundred twenty-one million, three hundred fifty-five thousand, thirty-one".