1213156625101 has 4 divisors (see below), whose sum is σ = 1213924933600. Its totient is φ = 1212388316604.

The previous prime is 1213156625069. The next prime is 1213156625119. The reversal of 1213156625101 is 1015266513121.

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 not a de Polignac number, because 1213156625101 - 2⁵ = 1213156625069 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 (1213156623101) 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, 384151881 + ... + 384155038.

It is an arithmetic number, because the mean of its divisors is an integer number (303481233400).

Almost surely, 2^{1213156625101} is an apocalyptic number.

It is an amenable number.

1213156625101 is a deficient number, since it is larger than the sum of its proper divisors (768308499).

1213156625101 is an equidigital number, since it uses as much as digits as its factorization.

1213156625101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768308498.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1213156625101 in words is "one trillion, two hundred thirteen billion, one hundred fifty-six million, six hundred twenty-five thousand, one hundred one".