21111021010986 has 16 divisors (see below), whose sum is σ = 42339652171200. Its totient is φ = 7017405312128.

The previous prime is 21111021010979. The next prime is 21111021010987. The reversal of 21111021010986 is 68901012011112.

It is not an unprimeable number, because it can be changed into a prime (21111021010987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4900420551 + ... + 4900424858.

It is an arithmetic number, because the mean of its divisors is an integer number (2646228260700).

Almost surely, 2^{21111021010986} is an apocalyptic number.

21111021010986 is an abundant number, since it is smaller than the sum of its proper divisors (21228631160214).

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

21111021010986 is a wasteful number, since it uses less digits than its factorization.

21111021010986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9800845773.

The product of its (nonzero) digits is 1728, while the sum is 33.

The spelling of 21111021010986 in words is "twenty-one trillion, one hundred eleven billion, twenty-one million, ten thousand, nine hundred eighty-six".