2011021119978 has 16 divisors (see below), whose sum is σ = 4331430104736. Its totient is φ = 618775729200.

The previous prime is 2011021119953. The next prime is 2011021119997. The reversal of 2011021119978 is 8799111201102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12891160948 + ... + 12891161103.

It is an arithmetic number, because the mean of its divisors is an integer number (270714381546).

Almost surely, 2^{2011021119978} is an apocalyptic number.

2011021119978 is an abundant number, since it is smaller than the sum of its proper divisors (2320408984758).

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

2011021119978 is a wasteful number, since it uses less digits than its factorization.

2011021119978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25782322069.

The product of its (nonzero) digits is 18144, while the sum is 42.

The spelling of 2011021119978 in words is "two trillion, eleven billion, twenty-one million, one hundred nineteen thousand, nine hundred seventy-eight".