2121002221110 has 16 divisors (see below), whose sum is σ = 5090405330736. Its totient is φ = 565600592288.

The previous prime is 2121002221087. The next prime is 2121002221111. The reversal of 2121002221110 is 111222001212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121002221110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121002221111) 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, 35350036989 + ... + 35350037048.

It is an arithmetic number, because the mean of its divisors is an integer number (318150333171).

Almost surely, 2^{2121002221110} is an apocalyptic number.

2121002221110 is an abundant number, since it is smaller than the sum of its proper divisors (2969403109626).

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

2121002221110 is a wasteful number, since it uses less digits than its factorization.

2121002221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70700074047.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121002221110 its reverse (111222001212), we get a palindrome (2232224222322).

The spelling of 2121002221110 in words is "two trillion, one hundred twenty-one billion, two million, two hundred twenty-one thousand, one hundred ten".