20122201021 has 16 divisors (see below), whose sum is σ = 21886300800. Its totient is φ = 18389805120.

The previous prime is 20122201019. The next prime is 20122201109. The reversal of 20122201021 is 12010222102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20122201021 - 2¹ = 20122201019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20122200992 and 20122201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122205021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585706 + ... + 619108.

It is an arithmetic number, because the mean of its divisors is an integer number (1367893800).

Almost surely, 2^20122201021 is an apocalyptic number.

It is an amenable number.

20122201021 is a deficient number, since it is larger than the sum of its proper divisors (1764099779).

20122201021 is a wasteful number, since it uses less digits than its factorization.

20122201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33876.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20122201021 its reverse (12010222102), we get a palindrome (32132423123).

The spelling of 20122201021 in words is "twenty billion, one hundred twenty-two million, two hundred one thousand, twenty-one".