2121110210100 has 144 divisors (see below), whose sum is σ = 7098308679168. Its totient is φ = 478983884160.

The previous prime is 2121110210099. The next prime is 2121110210111. The reversal of 2121110210100 is 10120111212.

It is a super-2 number, since 2×2121110210100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5910354 + ... + 6258953.

It is an arithmetic number, because the mean of its divisors is an integer number (49293810272).

Almost surely, 2^{2121110210100} is an apocalyptic number.

2121110210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121110210100 is an abundant number, since it is smaller than the sum of its proper divisors (4977198469068).

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

2121110210100 is a wasteful number, since it uses less digits than its factorization.

2121110210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169414 (or 12169407 counting only the distinct ones).

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

Adding to 2121110210100 its reverse (10120111212), we get a palindrome (2131230321312).

The spelling of 2121110210100 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, two hundred ten thousand, one hundred".