22121002002 has 32 divisors (see below), whose sum is σ = 48583655424. Its totient is φ = 6658938000.

The previous prime is 22121001989. The next prime is 22121002009. The reversal of 22121002002 is 20020012122.

It is not an unprimeable number, because it can be changed into a prime (22121002009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099858 + ... + 1119789.

It is an arithmetic number, because the mean of its divisors is an integer number (1518239232).

Almost surely, 2^22121002002 is an apocalyptic number.

22121002002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22121002002 is an abundant number, since it is smaller than the sum of its proper divisors (26462653422).

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

22121002002 is a wasteful number, since it uses less digits than its factorization.

22121002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219814.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22121002002 its reverse (20020012122), we get a palindrome (42141014124).

The spelling of 22121002002 in words is "twenty-two billion, one hundred twenty-one million, two thousand, two".