21321211433100 has 36 divisors (see below), whose sum is σ = 61689371747304. Its totient is φ = 5685656382080.

The previous prime is 21321211433099. The next prime is 21321211433113. The reversal of 21321211433100 is 133411212312.

It is a super-2 number, since 2×21321211433100² (a number of 27 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, 35535352089 + ... + 35535352688.

Almost surely, 2^{21321211433100} is an apocalyptic number.

21321211433100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321211433100 is an abundant number, since it is smaller than the sum of its proper divisors (40368160314204).

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

21321211433100 is a wasteful number, since it uses less digits than its factorization.

21321211433100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71070704794 (or 71070704787 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21321211433100 its reverse (133411212312), we get a palindrome (21454622645412).

The spelling of 21321211433100 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred eleven million, four hundred thirty-three thousand, one hundred".