101022201220978 has 4 divisors (see below), whose sum is σ = 151533301831470. Its totient is φ = 50511100610488.

The previous prime is 101022201220961. The next prime is 101022201220979. The reversal of 101022201220978 is 879022102220101.

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., 77917288363929 + 23104912857049 = 8827077^2 + 4806757^2 .

It is not an unprimeable number, because it can be changed into a prime (101022201220979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25255550305243 + ... + 25255550305246.

Almost surely, 2^{101022201220978} is an apocalyptic number.

101022201220978 is a deficient number, since it is larger than the sum of its proper divisors (50511100610492).

101022201220978 is an equidigital number, since it uses as much as digits as its factorization.

101022201220978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50511100610491.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 101022201220978 in words is "one hundred one trillion, twenty-two billion, two hundred one million, two hundred twenty thousand, nine hundred seventy-eight".