100211211109978 has 4 divisors (see below), whose sum is σ = 150316816664970. Its totient is φ = 50105605554988.

The previous prime is 100211211109969. The next prime is 100211211110011. The reversal of 100211211109978 is 879901112112001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89064273387769 + 11146937722209 = 9437387^2 + 3338703^2 .

It is a super-2 number, since 2×100211211109978² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25052802777493 + ... + 25052802777496.

Almost surely, 2^{100211211109978} is an apocalyptic number.

100211211109978 is a deficient number, since it is larger than the sum of its proper divisors (50105605554992).

100211211109978 is an equidigital number, since it uses as much as digits as its factorization.

100211211109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50105605554991.

The product of its (nonzero) digits is 18144, while the sum is 43.

The spelling of 100211211109978 in words is "one hundred trillion, two hundred eleven billion, two hundred eleven million, one hundred nine thousand, nine hundred seventy-eight".