21022220021000 has 256 divisors, whose sum is σ = 53877154406400. Its totient is φ = 7614135648000.

The previous prime is 21022220020961. The next prime is 21022220021039. The reversal of 21022220021000 is 12002222012.

21022220021000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21022220020961) and next prime (21022220021039).

It is a super-2 number, since 2×21022220021000² (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 63 ways as a sum of consecutive naturals, for example, 3597844079 + ... + 3597849921.

It is an arithmetic number, because the mean of its divisors is an integer number (210457634400).

Almost surely, 2^{21022220021000} is an apocalyptic number.

21022220021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022220021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26938577203200).

21022220021000 is an abundant number, since it is smaller than the sum of its proper divisors (32854934385400).

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

21022220021000 is a wasteful number, since it uses less digits than its factorization.

21022220021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117 (or 7103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21022220021000 its reverse (12002222012), we get a palindrome (21034222243012).

The spelling of 21022220021000 in words is "twenty-one trillion, twenty-two billion, two hundred twenty million, twenty-one thousand".