22101221002020 has 96 divisors (see below), whose sum is σ = 61937203910400. Its totient is φ = 5888538722304.

The previous prime is 22101221002013. The next prime is 22101221002031. The reversal of 22101221002020 is 2020012210122.

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, 350075697 + ... + 350138823.

It is an arithmetic number, because the mean of its divisors is an integer number (645179207400).

Almost surely, 2^{22101221002020} is an apocalyptic number.

22101221002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101221002020 is an abundant number, since it is smaller than the sum of its proper divisors (39835982908380).

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

22101221002020 is a wasteful number, since it uses less digits than its factorization.

22101221002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68117 (or 68115 counting only the distinct ones).

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

Adding to 22101221002020 its reverse (2020012210122), we get a palindrome (24121233212142).

The spelling of 22101221002020 in words is "twenty-two trillion, one hundred one billion, two hundred twenty-one million, two thousand, twenty".