21210222001100 has 72 divisors (see below), whose sum is σ = 50215695114816. Its totient is φ = 7711991560000.

The previous prime is 21210222001093. The next prime is 21210222001127. The reversal of 21210222001100 is 110022201212.

It is a super-3 number, since 3×21210222001100³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9424295 + ... + 11455905.

It is an arithmetic number, because the mean of its divisors is an integer number (697440209928).

Almost surely, 2^{21210222001100} is an apocalyptic number.

21210222001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210222001100 is an abundant number, since it is smaller than the sum of its proper divisors (29005473113716).

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

21210222001100 is a wasteful number, since it uses less digits than its factorization.

21210222001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041127 (or 2041120 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210222001100 its reverse (110022201212), we get a palindrome (21320244202312).

The spelling of 21210222001100 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, one thousand, one hundred".