22012021021020 has 96 divisors (see below), whose sum is σ = 62807729660928. Its totient is φ = 5758095412992.

The previous prime is 22012021021007. The next prime is 22012021021033. The reversal of 22012021021020 is 2012012021022.

It is an interprime number because it is at equal distance from previous prime (22012021021007) and next prime (22012021021033).

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

It is a congruent number.

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, 17344567 + ... + 18570353.

It is an arithmetic number, because the mean of its divisors is an integer number (654247183968).

Almost surely, 2^{22012021021020} is an apocalyptic number.

22012021021020 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 22012021021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31403864830464).

22012021021020 is an abundant number, since it is smaller than the sum of its proper divisors (40795708639908).

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

22012021021020 is a wasteful number, since it uses less digits than its factorization.

22012021021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231499 (or 1231497 counting only the distinct ones).

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

Adding to 22012021021020 its reverse (2012012021022), we get a palindrome (24024033042042).

The spelling of 22012021021020 in words is "twenty-two trillion, twelve billion, twenty-one million, twenty-one thousand, twenty".