21122110000 has 150 divisors (see below), whose sum is σ = 53981136132. Its totient is φ = 8002800000.

The previous prime is 21122109959. The next prime is 21122110001. The reversal of 21122110000 is 1122112.

It is a super-3 number, since 3×21122110000³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21122110001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3607075 + ... + 3612925.

Almost surely, 2^21122110000 is an apocalyptic number.

21122110000 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 21122110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26990568066).

21122110000 is an abundant number, since it is smaller than the sum of its proper divisors (32859026132).

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

21122110000 is an equidigital number, since it uses as much as digits as its factorization.

21122110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917 (or 5877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21122110000 its reverse (1122112), we get a palindrome (21123232112).

It can be divided in two parts, 2112 and 2110000, that added together give a palindrome (2112112).

The spelling of 21122110000 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand".