212020867867 has 2 divisors, whose sum is σ = 212020867868. Its totient is φ = 212020867866.

The previous prime is 212020867859. The next prime is 212020867889. The reversal of 212020867867 is 768768020212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212020867867 - 2³ = 212020867859 is a prime.

It is a super-2 number, since 2×212020867867² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212020867867.

It is not a weakly prime, because it can be changed into another prime (212020867367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010433933 + 106010433934.

It is an arithmetic number, because the mean of its divisors is an integer number (106010433934).

Almost surely, 2^212020867867 is an apocalyptic number.

212020867867 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020867867 is an equidigital number, since it uses as much as digits as its factorization.

212020867867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 212020867867 in words is "two hundred twelve billion, twenty million, eight hundred sixty-seven thousand, eight hundred sixty-seven".