212540412287969 has 4 divisors (see below), whose sum is σ = 212557186068480. Its totient is φ = 212523638507460.

The previous prime is 212540412287893. The next prime is 212540412288007. The reversal of 212540412287969 is 969782214045212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212540412287969 - 2³² = 212536117320673 is a prime.

It is a super-2 number, since 2×212540412287969² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212540412287869) 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, 8386871249 + ... + 8386896590.

It is an arithmetic number, because the mean of its divisors is an integer number (53139296517120).

Almost surely, 2^{212540412287969} is an apocalyptic number.

It is an amenable number.

212540412287969 is a deficient number, since it is larger than the sum of its proper divisors (16773780511).

212540412287969 is a wasteful number, since it uses less digits than its factorization.

212540412287969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773780510.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 212540412287969 in words is "two hundred twelve trillion, five hundred forty billion, four hundred twelve million, two hundred eighty-seven thousand, nine hundred sixty-nine".