22121212212020 has 24 divisors (see below), whose sum is σ = 46455381058464. Its totient is φ = 8848325758496.

The previous prime is 22121212211963. The next prime is 22121212212049. The reversal of 22121212212020 is 2021221212122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22121212211983 and 22121212212001.

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, 8802254 + ... + 11032773.

It is an arithmetic number, because the mean of its divisors is an integer number (1935640877436).

Almost surely, 2^{22121212212020} is an apocalyptic number.

22121212212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121212212020 is an abundant number, since it is smaller than the sum of its proper divisors (24334168846444).

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

22121212212020 is a wasteful number, since it uses less digits than its factorization.

22121212212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19890799 (or 19890797 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22121212212020 its reverse (2021221212122), we get a palindrome (24142433424142).

The spelling of 22121212212020 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, twenty".