21011110112010 has 32 divisors (see below), whose sum is σ = 50665653214272. Its totient is φ = 5576408369280.

The previous prime is 21011110111987. The next prime is 21011110112021. The reversal of 21011110112010 is 1021101111012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1659639019 + ... + 1659651678.

It is an arithmetic number, because the mean of its divisors is an integer number (1583301662946).

Almost surely, 2^{21011110112010} is an apocalyptic number.

21011110112010 is an abundant number, since it is smaller than the sum of its proper divisors (29654543102262).

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

21011110112010 is a wasteful number, since it uses less digits than its factorization.

21011110112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319290918.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21011110112010 its reverse (1021101111012), we get a palindrome (22032211223022).

The spelling of 21011110112010 in words is "twenty-one trillion, eleven billion, one hundred ten million, one hundred twelve thousand, ten".