21211200013100 has 36 divisors (see below), whose sum is σ = 46029346902000. Its totient is φ = 8484287770560.

The previous prime is 21211200013099. The next prime is 21211200013109. The reversal of 21211200013100 is 131000211212.

It is a super-2 number, since 2×21211200013100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211200013109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2074241 + ... + 6835559.

It is an arithmetic number, because the mean of its divisors is an integer number (1278592969500).

Almost surely, 2^{21211200013100} is an apocalyptic number.

21211200013100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211200013100 is an abundant number, since it is smaller than the sum of its proper divisors (24818146888900).

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

21211200013100 is a wasteful number, since it uses less digits than its factorization.

21211200013100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805882 (or 4805875 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21211200013100 its reverse (131000211212), we get a palindrome (21342200224312).

The spelling of 21211200013100 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, thirteen thousand, one hundred".