3121121031 has 16 divisors (see below), whose sum is σ = 4763721984. Its totient is φ = 1780599744.

The previous prime is 3121120997. The next prime is 3121121053. The reversal of 3121121031 is 1301211213.

It is a happy number.

It is not a de Polignac number, because 3121121031 - 2¹¹ = 3121118983 is a prime.

It is a super-2 number, since 2×3121121031² = 19482792980301005922, 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 3121121031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121121131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107485 + ... + 133398.

It is an arithmetic number, because the mean of its divisors is an integer number (297732624).

Almost surely, 2^3121121031 is an apocalyptic number.

3121121031 is a deficient number, since it is larger than the sum of its proper divisors (1642600953).

3121121031 is a wasteful number, since it uses less digits than its factorization.

3121121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241510.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 3121121031 is about 55866.9941110133. The cubic root of 3121121031 is about 1461.4037026904.

Adding to 3121121031 its reverse (1301211213), we get a palindrome (4422332244).

The spelling of 3121121031 in words is "three billion, one hundred twenty-one million, one hundred twenty-one thousand, thirty-one".