31101130121 has 8 divisors (see below), whose sum is σ = 31390303560. Its totient is φ = 30812026752.

The previous prime is 31101130087. The next prime is 31101130163. The reversal of 31101130121 is 12103110113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12587718025 + 18513412096 = 112195^2 + 136064^2 .

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 31101130121 - 2²² = 31096935817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31101130096 and 31101130105.

It is not an unprimeable number, because it can be changed into a prime (31101130421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409651 + ... + 1431543.

It is an arithmetic number, because the mean of its divisors is an integer number (3923787945).

Almost surely, 2^31101130121 is an apocalyptic number.

It is an amenable number.

31101130121 is a deficient number, since it is larger than the sum of its proper divisors (289173439).

31101130121 is a wasteful number, since it uses less digits than its factorization.

31101130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35035.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31101130121 its reverse (12103110113), we get a palindrome (43204240234).

The spelling of 31101130121 in words is "thirty-one billion, one hundred one million, one hundred thirty thousand, one hundred twenty-one".