212142763897 has 4 divisors (see below), whose sum is σ = 212160878080. Its totient is φ = 212124649716.

The previous prime is 212142763879. The next prime is 212142763979. The reversal of 212142763897 is 798367241212.

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 a de Polignac number, because none of the positive numbers 2^k-212142763897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212142763297) 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, 9039513 + ... + 9062950.

It is an arithmetic number, because the mean of its divisors is an integer number (53040219520).

Almost surely, 2^212142763897 is an apocalyptic number.

It is an amenable number.

212142763897 is a deficient number, since it is larger than the sum of its proper divisors (18114183).

212142763897 is a wasteful number, since it uses less digits than its factorization.

212142763897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114182.

The product of its digits is 2032128, while the sum is 52.

The spelling of 212142763897 in words is "two hundred twelve billion, one hundred forty-two million, seven hundred sixty-three thousand, eight hundred ninety-seven".