21120112001010 has 128 divisors (see below), whose sum is σ = 55646590132224. Its totient is φ = 5087604764160.

The previous prime is 21120112000961. The next prime is 21120112001029. The reversal of 21120112001010 is 1010021102112.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290806222 + ... + 290878838.

It is an arithmetic number, because the mean of its divisors is an integer number (434738985408).

Almost surely, 2^{21120112001010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21120112001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27823295066112).

21120112001010 is an abundant number, since it is smaller than the sum of its proper divisors (34526478131214).

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

21120112001010 is a wasteful number, since it uses less digits than its factorization.

21120112001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78208.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21120112001010 its reverse (1010021102112), we get a palindrome (22130133103122).

The spelling of 21120112001010 in words is "twenty-one trillion, one hundred twenty billion, one hundred twelve million, one thousand, ten".