121232031 has 4 divisors (see below), whose sum is σ = 161642712. Its totient is φ = 80821352.

The previous prime is 121232029. The next prime is 121232051. The reversal of 121232031 is 130232121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121232031 - 2¹ = 121232029 is a prime.

It is a super-2 number, since 2×121232031² = 29394410680769922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121232031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20205336 + ... + 20205341.

It is an arithmetic number, because the mean of its divisors is an integer number (40410678).

Almost surely, 2^121232031 is an apocalyptic number.

121232031 is a deficient number, since it is larger than the sum of its proper divisors (40410681).

121232031 is an equidigital number, since it uses as much as digits as its factorization.

121232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40410680.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121232031 is about 11010.5418122815. The cubic root of 121232031 is about 494.9246982688.

Adding to 121232031 its reverse (130232121), we get a palindrome (251464152).

The spelling of 121232031 in words is "one hundred twenty-one million, two hundred thirty-two thousand, thirty-one".