21110121202100 has 36 divisors (see below), whose sum is σ = 52353100582944. Its totient is φ = 7237755840480.

The previous prime is 21110121202081. The next prime is 21110121202117. The reversal of 21110121202100 is 120212101112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15078657302 + ... + 15078658701.

Almost surely, 2^{21110121202100} is an apocalyptic number.

21110121202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110121202100 is an abundant number, since it is smaller than the sum of its proper divisors (31242979380844).

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

21110121202100 is a wasteful number, since it uses less digits than its factorization.

21110121202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30157316024 (or 30157316017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110121202100 its reverse (120212101112), we get a palindrome (21230333303212).

The spelling of 21110121202100 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, two hundred two thousand, one hundred".