1372212105557 has 2 divisors, whose sum is σ = 1372212105558. Its totient is φ = 1372212105556.

The previous prime is 1372212105529. The next prime is 1372212105587. The reversal of 1372212105557 is 7555012122731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1356780006481 + 15432099076 = 1164809^2 + 124226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372212105557 - 2⁸ = 1372212105301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372212105527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686106052778 + 686106052779.

It is an arithmetic number, because the mean of its divisors is an integer number (686106052779).

Almost surely, 2^{1372212105557} is an apocalyptic number.

It is an amenable number.

1372212105557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372212105557 is an equidigital number, since it uses as much as digits as its factorization.

1372212105557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 1372212105557 in words is "one trillion, three hundred seventy-two billion, two hundred twelve million, one hundred five thousand, five hundred fifty-seven".