210100220120978 has 64 divisors (see below), whose sum is σ = 355358803909248. Its totient is φ = 92322616389120.

The previous prime is 210100220120977. The next prime is 210100220121031. The reversal of 210100220120978 is 879021022001012.

It is a super-3 number, since 3×210100220120978³ (a number of 44 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210100220120977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4946655950 + ... + 4946698422.

It is an arithmetic number, because the mean of its divisors is an integer number (5552481311082).

Almost surely, 2^{210100220120978} is an apocalyptic number.

210100220120978 is a deficient number, since it is larger than the sum of its proper divisors (145258583788270).

210100220120978 is a wasteful number, since it uses less digits than its factorization.

210100220120978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81387.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 210100220120978 in words is "two hundred ten trillion, one hundred billion, two hundred twenty million, one hundred twenty thousand, nine hundred seventy-eight".