212498819977 has 4 divisors (see below), whose sum is σ = 213282948736. Its totient is φ = 211714691220.

The previous prime is 212498819899. The next prime is 212498820019. The reversal of 212498819977 is 779918894212.

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 212498819977 - 2¹¹ = 212498817929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212498819177) 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, 392063973 + ... + 392064514.

It is an arithmetic number, because the mean of its divisors is an integer number (53320737184).

Almost surely, 2^212498819977 is an apocalyptic number.

It is an amenable number.

212498819977 is a deficient number, since it is larger than the sum of its proper divisors (784128759).

212498819977 is an equidigital number, since it uses as much as digits as its factorization.

212498819977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784128758.

The product of its digits is 36578304, while the sum is 67.

The spelling of 212498819977 in words is "two hundred twelve billion, four hundred ninety-eight million, eight hundred nineteen thousand, nine hundred seventy-seven".