1213137031 has 2 divisors, whose sum is σ = 1213137032. Its totient is φ = 1213137030.

The previous prime is 1213136971. The next prime is 1213137053. The reversal of 1213137031 is 1307313121.

It is an a-pointer prime, because the next prime (1213137053) can be obtained adding 1213137031 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213137031 - 2¹¹ = 1213134983 is a prime.

It is a super-2 number, since 2×1213137031² = 2943402911966989922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213136993 and 1213137011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213134031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606568515 + 606568516.

It is an arithmetic number, because the mean of its divisors is an integer number (606568516).

Almost surely, 2^1213137031 is an apocalyptic number.

1213137031 is the 22029-th centered pentagonal number.

1213137031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213137031 is an equidigital number, since it uses as much as digits as its factorization.

1213137031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1213137031 is about 34830.1167238928. The cubic root of 1213137031 is about 1066.5223311321.

The spelling of 1213137031 in words is "one billion, two hundred thirteen million, one hundred thirty-seven thousand, thirty-one".