212503566561 has 32 divisors (see below), whose sum is σ = 332953528320. Its totient is φ = 118854254400.

The previous prime is 212503566559. The next prime is 212503566571. The reversal of 212503566561 is 165665305212.

It is not a de Polignac number, because 212503566561 - 2¹ = 212503566559 is a prime.

It is a super-2 number, since 2×212503566561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212503566511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1774270 + ... + 1890248.

It is an arithmetic number, because the mean of its divisors is an integer number (10404797760).

Almost surely, 2^212503566561 is an apocalyptic number.

It is an amenable number.

212503566561 is a deficient number, since it is larger than the sum of its proper divisors (120449961759).

212503566561 is a wasteful number, since it uses less digits than its factorization.

212503566561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120277.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 212503566561 in words is "two hundred twelve billion, five hundred three million, five hundred sixty-six thousand, five hundred sixty-one".