2121010331100 has 72 divisors (see below), whose sum is σ = 6334750883328. Its totient is φ = 547357502400.

The previous prime is 2121010331057. The next prime is 2121010331101. The reversal of 2121010331100 is 11330101212.

It is a happy number.

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 2121010331100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121010331101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114023514 + ... + 114042113.

Almost surely, 2^{2121010331100} is an apocalyptic number.

2121010331100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121010331100 is an abundant number, since it is smaller than the sum of its proper divisors (4213740552228).

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

2121010331100 is a wasteful number, since it uses less digits than its factorization.

2121010331100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228065675 (or 228065668 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 2121010331100 its reverse (11330101212), we get a palindrome (2132340432312).

The spelling of 2121010331100 in words is "two trillion, one hundred twenty-one billion, ten million, three hundred thirty-one thousand, one hundred".