21111000020110 has 64 divisors (see below), whose sum is σ = 51020710562304. Its totient is φ = 6073894108800.

The previous prime is 21111000020069. The next prime is 21111000020153. The reversal of 21111000020110 is 1102000011112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1054485496 + ... + 1054505515.

It is an arithmetic number, because the mean of its divisors is an integer number (797198602536).

Almost surely, 2^{21111000020110} is an apocalyptic number.

21111000020110 is an abundant number, since it is smaller than the sum of its proper divisors (29909710542194).

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

21111000020110 is a wasteful number, since it uses less digits than its factorization.

21111000020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108991049.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21111000020110 its reverse (1102000011112), we get a palindrome (22213000031222).

The spelling of 21111000020110 in words is "twenty-one trillion, one hundred eleven billion, twenty thousand, one hundred ten".