121027431 has 16 divisors (see below), whose sum is σ = 185165568. Its totient is φ = 68880000.

The previous prime is 121027429. The next prime is 121027433. The reversal of 121027431 is 134720121.

It is an interprime number because it is at equal distance from previous prime (121027429) and next prime (121027433).

It is not a de Polignac number, because 121027431 - 2¹ = 121027429 is a prime.

It is a super-2 number, since 2×121027431² = 29295278108919522, 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 = 121027398 and 121027407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121027433) 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, 6210 + ... + 16751.

It is an arithmetic number, because the mean of its divisors is an integer number (11572848).

Almost surely, 2^121027431 is an apocalyptic number.

121027431 is a deficient number, since it is larger than the sum of its proper divisors (64138137).

121027431 is a wasteful number, since it uses less digits than its factorization.

121027431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23222.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 121027431 is about 11001.2467929776. The cubic root of 121027431 is about 494.6461178437.

Adding to 121027431 its reverse (134720121), we get a palindrome (255747552).

The spelling of 121027431 in words is "one hundred twenty-one million, twenty-seven thousand, four hundred thirty-one".