11111022209978 has 8 divisors (see below), whose sum is σ = 16669079009472. Its totient is φ = 5554662540156.

The previous prime is 11111022209957. The next prime is 11111022209981. The reversal of 11111022209978 is 87990222011111.

11111022209978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 424266050 + ... + 424292237.

It is an arithmetic number, because the mean of its divisors is an integer number (2083634876184).

Almost surely, 2^{11111022209978} is an apocalyptic number.

11111022209978 is a deficient number, since it is larger than the sum of its proper divisors (5558056799494).

11111022209978 is an equidigital number, since it uses as much as digits as its factorization.

11111022209978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848564836.

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 11111022209978 in words is "eleven trillion, one hundred eleven billion, twenty-two million, two hundred nine thousand, nine hundred seventy-eight".