212564655101 has 8 divisors (see below), whose sum is σ = 213193033560. Its totient is φ = 211937104192.

The previous prime is 212564655089. The next prime is 212564655119. The reversal of 212564655101 is 101556465212.

It can be written as a sum of positive squares in 4 ways, for example, as 11383876 + 212553271225 = 3374^2 + 461035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212564655101 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 (212564655181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309491 + ... + 721743.

It is an arithmetic number, because the mean of its divisors is an integer number (26649129195).

Almost surely, 2^212564655101 is an apocalyptic number.

It is an amenable number.

212564655101 is a deficient number, since it is larger than the sum of its proper divisors (628378459).

212564655101 is a wasteful number, since it uses less digits than its factorization.

212564655101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413775.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 212564655101 in words is "two hundred twelve billion, five hundred sixty-four million, six hundred fifty-five thousand, one hundred one".