2131121103031 has 8 divisors (see below), whose sum is σ = 2131682966784. Its totient is φ = 2130559324920.

The previous prime is 2131121103017. The next prime is 2131121103043. The reversal of 2131121103031 is 1303011211312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131121103031 - 2²⁵ = 2131087548599 is a prime.

It is a super-2 number, since 2×2131121103031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131121103431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104400216 + ... + 104420626.

It is an arithmetic number, because the mean of its divisors is an integer number (266460370848).

Almost surely, 2^{2131121103031} is an apocalyptic number.

2131121103031 is a deficient number, since it is larger than the sum of its proper divisors (561863753).

2131121103031 is a wasteful number, since it uses less digits than its factorization.

2131121103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42821.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 2131121103031 its reverse (1303011211312), we get a palindrome (3434132314343).

The spelling of 2131121103031 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, one hundred three thousand, thirty-one".