202221109978 has 8 divisors (see below), whose sum is σ = 303520426272. Its totient is φ = 101047634556.

The previous prime is 202221109963. The next prime is 202221109991. The reversal of 202221109978 is 879901122202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 31456200 + ... + 31462627.

It is an arithmetic number, because the mean of its divisors is an integer number (37940053284).

Almost surely, 2^202221109978 is an apocalyptic number.

202221109978 is a deficient number, since it is larger than the sum of its proper divisors (101299316294).

202221109978 is a wasteful number, since it uses less digits than its factorization.

202221109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62920436.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 202221109978 in words is "two hundred two billion, two hundred twenty-one million, one hundred nine thousand, nine hundred seventy-eight".