1213101139 has 2 divisors, whose sum is σ = 1213101140. Its totient is φ = 1213101138.

The previous prime is 1213101133. The next prime is 1213101157. The reversal of 1213101139 is 9311013121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213101139 - 2¹¹ = 1213099091 is a prime.

It is a super-2 number, since 2×1213101139² = 2943228746886194642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213101133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606550569 + 606550570.

It is an arithmetic number, because the mean of its divisors is an integer number (606550570).

Almost surely, 2^1213101139 is an apocalyptic number.

1213101139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213101139 is an equidigital number, since it uses as much as digits as its factorization.

1213101139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1213101139 is about 34829.6014763304. The cubic root of 1213101139 is about 1066.5118129477.

The spelling of 1213101139 in words is "one billion, two hundred thirteen million, one hundred one thousand, one hundred thirty-nine".