31133022121 has 2 divisors, whose sum is σ = 31133022122. Its totient is φ = 31133022120.

The previous prime is 31133022103. The next prime is 31133022139. The reversal of 31133022121 is 12122033113.

It is a balanced prime because it is at equal distance from previous prime (31133022103) and next prime (31133022139).

It can be written as a sum of positive squares in only one way, i.e., 29262892096 + 1870130025 = 171064^2 + 43245^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133022121 - 2⁷ = 31133021993 is a prime.

It is not a weakly prime, because it can be changed into another prime (31133022721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566511060 + 15566511061.

It is an arithmetic number, because the mean of its divisors is an integer number (15566511061).

Almost surely, 2^31133022121 is an apocalyptic number.

It is an amenable number.

31133022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133022121 is an equidigital number, since it uses as much as digits as its factorization.

31133022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31133022121 its reverse (12122033113), we get a palindrome (43255055234).

The spelling of 31133022121 in words is "thirty-one billion, one hundred thirty-three million, twenty-two thousand, one hundred twenty-one".