2121111121100 has 36 divisors (see below), whose sum is σ = 4603428023208. Its totient is φ = 848330736000.

The previous prime is 2121111121081. The next prime is 2121111121127. The reversal of 2121111121100 is 11211111212.

It is a super-2 number, since 2×2121111121100² (a number of 25 digits) contains 22 as substring.

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, 669566 + ... + 2165765.

Almost surely, 2^{2121111121100} is an apocalyptic number.

2121111121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121111121100 is an abundant number, since it is smaller than the sum of its proper divisors (2482316902108).

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

2121111121100 is a wasteful number, since it uses less digits than its factorization.

2121111121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842826 (or 2842819 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2121111121100 its reverse (11211111212), we get a palindrome (2132322232312).

The spelling of 2121111121100 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred".