20223121222021 has 16 divisors (see below), whose sum is σ = 21307053075840. Its totient is φ = 19141148093760.

The previous prime is 20223121222019. The next prime is 20223121222033. The reversal of 20223121222021 is 12022212132202.

It is a happy number.

It is not a de Polignac number, because 20223121222021 - 2¹ = 20223121222019 is a prime.

It is a super-2 number, since 2×20223121222021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20223121221983 and 20223121222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223121222061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288121551 + ... + 288191731.

It is an arithmetic number, because the mean of its divisors is an integer number (1331690817240).

Almost surely, 2^{20223121222021} is an apocalyptic number.

It is an amenable number.

20223121222021 is a deficient number, since it is larger than the sum of its proper divisors (1083931853819).

20223121222021 is a wasteful number, since it uses less digits than its factorization.

20223121222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83916.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20223121222021 its reverse (12022212132202), we get a palindrome (32245333354223).

The spelling of 20223121222021 in words is "twenty trillion, two hundred twenty-three billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".