20201231020220 has 24 divisors (see below), whose sum is σ = 42424010496000. Its totient is φ = 8080220912192.

The previous prime is 20201231020189. The next prime is 20201231020279. The reversal of 20201231020220 is 2202013210202.

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, 16357820 + ... + 17549379.

It is an arithmetic number, because the mean of its divisors is an integer number (1767667104000).

Almost surely, 2^{20201231020220} is an apocalyptic number.

20201231020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201231020220 is an abundant number, since it is smaller than the sum of its proper divisors (22222779475780).

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

20201231020220 is a wasteful number, since it uses less digits than its factorization.

20201231020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33936997 (or 33936995 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20201231020220 its reverse (2202013210202), we get a palindrome (22403244230422).

The spelling of 20201231020220 in words is "twenty trillion, two hundred one billion, two hundred thirty-one million, twenty thousand, two hundred twenty".