1213136971 has 2 divisors, whose sum is σ = 1213136972. Its totient is φ = 1213136970.

The previous prime is 1213136963. The next prime is 1213137031. The reversal of 1213136971 is 1796313121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213136971 - 2³ = 1213136963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213136471) 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, 606568485 + 606568486.

It is an arithmetic number, because the mean of its divisors is an integer number (606568486).

Almost surely, 2^1213136971 is an apocalyptic number.

1213136971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213136971 is an equidigital number, since it uses as much as digits as its factorization.

1213136971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 1213136971 is about 34830.1158625693. The cubic root of 1213136971 is about 1066.5223135492.

The spelling of 1213136971 in words is "one billion, two hundred thirteen million, one hundred thirty-six thousand, nine hundred seventy-one".