20212122221020 has 24 divisors (see below), whose sum is σ = 42445549432944. Its totient is φ = 8084831218176.

The previous prime is 20212122220967. The next prime is 20212122221041. The reversal of 20212122221020 is 2012222121202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12162124 + ... + 13723756.

It is an arithmetic number, because the mean of its divisors is an integer number (1768564559706).

Almost surely, 2^{20212122221020} is an apocalyptic number.

20212122221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212122221020 is an abundant number, since it is smaller than the sum of its proper divisors (22233427211924).

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

20212122221020 is a wasteful number, since it uses less digits than its factorization.

20212122221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208789 (or 2208787 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212122221020 its reverse (2012222121202), we get a palindrome (22224344342222).

The spelling of 20212122221020 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".