20222212021 has 16 divisors (see below), whose sum is σ = 22293730368. Its totient is φ = 18189792000.

The previous prime is 20222212009. The next prime is 20222212091. The reversal of 20222212021 is 12021222202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20222211986 and 20222212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222212001) 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, 1969126 + ... + 1979368.

It is an arithmetic number, because the mean of its divisors is an integer number (1393358148).

Almost surely, 2^20222212021 is an apocalyptic number.

It is an amenable number.

20222212021 is a deficient number, since it is larger than the sum of its proper divisors (2071518347).

20222212021 is a wasteful number, since it uses less digits than its factorization.

20222212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12132.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20222212021 its reverse (12021222202), we get a palindrome (32243434223).

The spelling of 20222212021 in words is "twenty billion, two hundred twenty-two million, two hundred twelve thousand, twenty-one".