212251321154413 has 4 divisors (see below), whose sum is σ = 215158873499068. Its totient is φ = 209343768809760.

The previous prime is 212251321154393. The next prime is 212251321154447. The reversal of 212251321154413 is 314451123152212.

212251321154413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177569563223529 + 34681757930884 = 13325523^2 + 5889122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212251321154413 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 (212251321104413) 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, 1453776172218 + ... + 1453776172363.

It is an arithmetic number, because the mean of its divisors is an integer number (53789718374767).

Almost surely, 2^{212251321154413} is an apocalyptic number.

It is an amenable number.

212251321154413 is a deficient number, since it is larger than the sum of its proper divisors (2907552344655).

212251321154413 is an equidigital number, since it uses as much as digits as its factorization.

212251321154413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907552344654.

The product of its digits is 57600, while the sum is 37.

The spelling of 212251321154413 in words is "two hundred twelve trillion, two hundred fifty-one billion, three hundred twenty-one million, one hundred fifty-four thousand, four hundred thirteen".