20021211022020 has 96 divisors (see below), whose sum is σ = 62996506175232. Its totient is φ = 4714024263168.

The previous prime is 20021211022019. The next prime is 20021211022039. The reversal of 20021211022020 is 2022011212002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557986827 + ... + 558022706.

It is an arithmetic number, because the mean of its divisors is an integer number (656213605992).

Almost surely, 2^{20021211022020} is an apocalyptic number.

20021211022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021211022020 is an abundant number, since it is smaller than the sum of its proper divisors (42975295153212).

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

20021211022020 is a wasteful number, since it uses less digits than its factorization.

20021211022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116009581 (or 1116009579 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021211022020 its reverse (2022011212002), we get a palindrome (22043222234022).

The spelling of 20021211022020 in words is "twenty trillion, twenty-one billion, two hundred eleven million, twenty-two thousand, twenty".