20021121120220 has 48 divisors (see below), whose sum is σ = 46158712211808. Its totient is φ = 7234035644160.

The previous prime is 20021121120157. The next prime is 20021121120251. The reversal of 20021121120220 is 2202112112002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021121120194 and 20021121120203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289790607 + ... + 289859686.

It is an arithmetic number, because the mean of its divisors is an integer number (961639837746).

Almost surely, 2^{20021121120220} is an apocalyptic number.

20021121120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021121120220 is an abundant number, since it is smaller than the sum of its proper divisors (26137591091588).

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

20021121120220 is a wasteful number, since it uses less digits than its factorization.

20021121120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579650470 (or 579650468 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021121120220 its reverse (2202112112002), we get a palindrome (22223233232222).

The spelling of 20021121120220 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty".