20210022121 has 8 divisors (see below), whose sum is σ = 20470641984. Its totient is φ = 19950641040.

The previous prime is 20210022109. The next prime is 20210022139. The reversal of 20210022121 is 12122001202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20210022121 - 2¹⁵ = 20209989353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276835 + ... + 342136.

It is an arithmetic number, because the mean of its divisors is an integer number (2558830248).

Almost surely, 2^20210022121 is an apocalyptic number.

It is an amenable number.

20210022121 is a deficient number, since it is larger than the sum of its proper divisors (260619863).

20210022121 is a wasteful number, since it uses less digits than its factorization.

20210022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619391.

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

Adding to 20210022121 its reverse (12122001202), we get a palindrome (32332023323).

The spelling of 20210022121 in words is "twenty billion, two hundred ten million, twenty-two thousand, one hundred twenty-one".