20012221011020 has 96 divisors (see below), whose sum is σ = 48436858068480. Its totient is φ = 6803335664640.

The previous prime is 20012221011011. The next prime is 20012221011059. The reversal of 20012221011020 is 2011012221002.

It is a super-2 number, since 2×20012221011020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20012221010986 and 20012221011004.

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, 7545140 + ... + 9846500.

It is an arithmetic number, because the mean of its divisors is an integer number (504550604880).

Almost surely, 2^{20012221011020} is an apocalyptic number.

20012221011020 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 20012221011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24218429034240).

20012221011020 is an abundant number, since it is smaller than the sum of its proper divisors (28424637057460).

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

20012221011020 is a wasteful number, since it uses less digits than its factorization.

20012221011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301903 (or 2301901 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012221011020 its reverse (2011012221002), we get a palindrome (22023233232022).

The spelling of 20012221011020 in words is "twenty trillion, twelve billion, two hundred twenty-one million, eleven thousand, twenty".