2102121111010 has 24 divisors (see below), whose sum is σ = 3878357207508. Its totient is φ = 820339939200.

The previous prime is 2102121110987. The next prime is 2102121111029. The reversal of 2102121111010 is 101111212012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 435783499321 + 1666337611689 = 660139^2 + 1290867^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62509101 + ... + 62542720.

Almost surely, 2^{2102121111010} is an apocalyptic number.

2102121111010 is a deficient number, since it is larger than the sum of its proper divisors (1776236096498).

2102121111010 is a wasteful number, since it uses less digits than its factorization.

2102121111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125051910 (or 125051869 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2102121111010 its reverse (101111212012), we get a palindrome (2203232323022).

The spelling of 2102121111010 in words is "two trillion, one hundred two billion, one hundred twenty-one million, one hundred eleven thousand, ten".