212256644501 has 16 divisors (see below), whose sum is σ = 233285158080. Its totient is φ = 191517386880.

The previous prime is 212256644443. The next prime is 212256644513. The reversal of 212256644501 is 105446652212.

It is a cyclic number.

It is not a de Polignac number, because 212256644501 - 2¹⁰ = 212256643477 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 (212256644401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12136175 + ... + 12153651.

It is an arithmetic number, because the mean of its divisors is an integer number (14580322380).

Almost surely, 2^212256644501 is an apocalyptic number.

It is an amenable number.

212256644501 is a deficient number, since it is larger than the sum of its proper divisors (21028513579).

212256644501 is a wasteful number, since it uses less digits than its factorization.

212256644501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25684.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 212256644501 in words is "two hundred twelve billion, two hundred fifty-six million, six hundred forty-four thousand, five hundred one".