20212001201178 has 48 divisors (see below), whose sum is σ = 44078350950816. Its totient is φ = 6693395847840.

The previous prime is 20212001200957. The next prime is 20212001201179. The reversal of 20212001201178 is 87110210021202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20212001201179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18025425 + ... + 19113867.

It is an arithmetic number, because the mean of its divisors is an integer number (918298978142).

Almost surely, 2^{20212001201178} is an apocalyptic number.

20212001201178 is an abundant number, since it is smaller than the sum of its proper divisors (23866349749638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20212001201178 is a wasteful number, since it uses less digits than its factorization.

20212001201178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095179 (or 1095176 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The spelling of 20212001201178 in words is "twenty trillion, two hundred twelve billion, one million, two hundred one thousand, one hundred seventy-eight".