212542522991 has 2 divisors, whose sum is σ = 212542522992. Its totient is φ = 212542522990.

The previous prime is 212542522943. The next prime is 212542523029. The reversal of 212542522991 is 199225245212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212542522991 - 2³⁴ = 195362653807 is a prime.

It is a super-4 number, since 4×212542522991⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212542522091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106271261495 + 106271261496.

It is an arithmetic number, because the mean of its divisors is an integer number (106271261496).

Almost surely, 2^212542522991 is an apocalyptic number.

212542522991 is a deficient number, since it is larger than the sum of its proper divisors (1).

212542522991 is an equidigital number, since it uses as much as digits as its factorization.

212542522991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The spelling of 212542522991 in words is "two hundred twelve billion, five hundred forty-two million, five hundred twenty-two thousand, nine hundred ninety-one".