12121031 has 16 divisors (see below), whose sum is σ = 14192640. Its totient is φ = 10251360.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121031 is 13012121.

It is a cyclic number.

It is not a de Polignac number, because 12121031 - 2⁶ = 12120967 is a prime.

It is a super-2 number, since 2×12121031² = 293838785005922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121061) 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, 6866 + ... + 8448.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^12121031 is an apocalyptic number.

12121031 is a deficient number, since it is larger than the sum of its proper divisors (2071609).

12121031 is a wasteful number, since it uses less digits than its factorization.

12121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12121031 is about 3481.5271074630. The cubic root of 12121031 is about 229.7099747024.

Adding to 12121031 its reverse (13012121), we get a palindrome (25133152).

The spelling of 12121031 in words is "twelve million, one hundred twenty-one thousand, thirty-one".