210681777812 has 12 divisors (see below), whose sum is σ = 402210666816. Its totient is φ = 95764444440.

The previous prime is 210681777809. The next prime is 210681777821. The reversal of 210681777812 is 218777186012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394111068 + ... + 2394111155.

It is an arithmetic number, because the mean of its divisors is an integer number (33517555568).

Almost surely, 2^210681777812 is an apocalyptic number.

210681777812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210681777812 is a deficient number, since it is larger than the sum of its proper divisors (191528889004).

210681777812 is a wasteful number, since it uses less digits than its factorization.

210681777812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788222238 (or 4788222236 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 50.

The spelling of 210681777812 in words is "two hundred ten billion, six hundred eighty-one million, seven hundred seventy-seven thousand, eight hundred twelve".