20202121124220 has 96 divisors (see below), whose sum is σ = 64647419655168. Its totient is φ = 4617582538752.

The previous prime is 20202121124219. The next prime is 20202121124243. The reversal of 20202121124220 is 2242112120202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62984092 + ... + 63304028.

It is an arithmetic number, because the mean of its divisors is an integer number (673410621408).

Almost surely, 2^{20202121124220} is an apocalyptic number.

20202121124220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202121124220 is an abundant number, since it is smaller than the sum of its proper divisors (44445298530948).

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

20202121124220 is a wasteful number, since it uses less digits than its factorization.

20202121124220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470299 (or 470297 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20202121124220 its reverse (2242112120202), we get a palindrome (22444233244422).

The spelling of 20202121124220 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-four thousand, two hundred twenty".