1312202101 has 4 divisors (see below), whose sum is σ = 1499659552. Its totient is φ = 1124744652.

The previous prime is 1312202039. The next prime is 1312202113. The reversal of 1312202101 is 1012022131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312202101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312202161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93728715 + ... + 93728728.

It is an arithmetic number, because the mean of its divisors is an integer number (374914888).

Almost surely, 2^1312202101 is an apocalyptic number.

It is an amenable number.

1312202101 is a deficient number, since it is larger than the sum of its proper divisors (187457451).

1312202101 is an equidigital number, since it uses as much as digits as its factorization.

1312202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187457450.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1312202101 is about 36224.3302353542. The cubic root of 1312202101 is about 1094.7969435059.

Adding to 1312202101 its reverse (1012022131), we get a palindrome (2324224232).

The spelling of 1312202101 in words is "one billion, three hundred twelve million, two hundred two thousand, one hundred one".