22121000021020 has 24 divisors (see below), whose sum is σ = 46458477584064. Its totient is φ = 8847566191296.

The previous prime is 22121000020997. The next prime is 22121000021023. The reversal of 22121000021020 is 2012000012122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121000021023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51896004 + ... + 52320523.

It is an arithmetic number, because the mean of its divisors is an integer number (1935769899336).

Almost surely, 2^{22121000021020} is an apocalyptic number.

22121000021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121000021020 is an abundant number, since it is smaller than the sum of its proper divisors (24337477563044).

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

22121000021020 is a wasteful number, since it uses less digits than its factorization.

22121000021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104227149 (or 104227147 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22121000021020 its reverse (2012000012122), we get a palindrome (24133000033142).

The spelling of 22121000021020 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one thousand, twenty".