20100101022020 has 96 divisors (see below), whose sum is σ = 44786780962560. Its totient is φ = 7561141378560.

The previous prime is 20100101022017. The next prime is 20100101022049. The reversal of 20100101022020 is 2022010100102.

It is a happy number.

It is a super-2 number, since 2×20100101022020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20100101021992 and 20100101022010.

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, 65479214 + ... + 65785466.

It is an arithmetic number, because the mean of its divisors is an integer number (466528968360).

Almost surely, 2^{20100101022020} is an apocalyptic number.

20100101022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20100101022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22393390481280).

20100101022020 is an abundant number, since it is smaller than the sum of its proper divisors (24686679940540).

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

20100101022020 is a wasteful number, since it uses less digits than its factorization.

20100101022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308685 (or 308683 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20100101022020 its reverse (2022010100102), we get a palindrome (22122111122122).

The spelling of 20100101022020 in words is "twenty trillion, one hundred billion, one hundred one million, twenty-two thousand, twenty".