20222102102021 has 4 divisors (see below), whose sum is σ = 20240435831232. Its totient is φ = 20203768372812.

The previous prime is 20222102101979. The next prime is 20222102102053. The reversal of 20222102102021 is 12020120122202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222102102021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222102102921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166862951 + ... + 9166865156.

It is an arithmetic number, because the mean of its divisors is an integer number (5060108957808).

Almost surely, 2^{20222102102021} is an apocalyptic number.

It is an amenable number.

20222102102021 is a deficient number, since it is larger than the sum of its proper divisors (18333729211).

20222102102021 is a wasteful number, since it uses less digits than its factorization.

20222102102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333729210.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20222102102021 its reverse (12020120122202), we get a palindrome (32242222224223).

The spelling of 20222102102021 in words is "twenty trillion, two hundred twenty-two billion, one hundred two million, one hundred two thousand, twenty-one".