21022100221012 has 48 divisors (see below), whose sum is σ = 41115452442624. Its totient is φ = 9321646400000.

The previous prime is 21022100220973. The next prime is 21022100221039. The reversal of 21022100221012 is 21012200122012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20983512 + ... + 21962512.

It is an arithmetic number, because the mean of its divisors is an integer number (856571925888).

Almost surely, 2^{21022100221012} is an apocalyptic number.

21022100221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21022100221012 is a deficient number, since it is larger than the sum of its proper divisors (20093352221612).

21022100221012 is a wasteful number, since it uses less digits than its factorization.

21022100221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990960 (or 990958 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022100221012 its reverse (21012200122012), we get a palindrome (42034300343024).

The spelling of 21022100221012 in words is "twenty-one trillion, twenty-two billion, one hundred million, two hundred twenty-one thousand, twelve".