22121101002 has 128 divisors (see below), whose sum is σ = 59991902208. Its totient is φ = 5251104000.

The previous prime is 22121100979. The next prime is 22121101007. The reversal of 22121101002 is 20010112122.

It is not an unprimeable number, because it can be changed into a prime (22121101007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 588373 + ... + 624839.

It is an arithmetic number, because the mean of its divisors is an integer number (468686736).

Almost surely, 2^22121101002 is an apocalyptic number.

22121101002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121101002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29995951104).

22121101002 is an abundant number, since it is smaller than the sum of its proper divisors (37870801206).

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

22121101002 is a wasteful number, since it uses less digits than its factorization.

22121101002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36604.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22121101002 its reverse (20010112122), we get a palindrome (42131213124).

The spelling of 22121101002 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, two".