31130122121 has 8 divisors (see below), whose sum is σ = 35578906944. Its totient is φ = 26681743440.

The previous prime is 31130122091. The next prime is 31130122157. The reversal of 31130122121 is 12122103113.

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 31130122121 - 2³⁴ = 13950252937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31130122121.

It is not an unprimeable number, because it can be changed into a prime (31130122321) 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, 85751 + ... + 263843.

It is an arithmetic number, because the mean of its divisors is an integer number (4447363368).

Almost surely, 2^31130122121 is an apocalyptic number.

It is an amenable number.

31130122121 is a deficient number, since it is larger than the sum of its proper divisors (4448784823).

31130122121 is a wasteful number, since it uses less digits than its factorization.

31130122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203071.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31130122121 its reverse (12122103113), we get a palindrome (43252225234).

The spelling of 31130122121 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-two thousand, one hundred twenty-one".