22122220120021 has 16 divisors (see below), whose sum is σ = 25348235489280. Its totient is φ = 18912653745840.

The previous prime is 22122220119931. The next prime is 22122220120067. The reversal of 22122220120021 is 12002102222122.

It is a cyclic number.

It is not a de Polignac number, because 22122220120021 - 2¹³ = 22122220111829 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 (22122220120321) 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, 9865890 + ... + 11898748.

It is an arithmetic number, because the mean of its divisors is an integer number (1584264718080).

Almost surely, 2^{22122220120021} is an apocalyptic number.

It is an amenable number.

22122220120021 is a deficient number, since it is larger than the sum of its proper divisors (3226015369259).

22122220120021 is a wasteful number, since it uses less digits than its factorization.

22122220120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036904.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22122220120021 its reverse (12002102222122), we get a palindrome (34124322342143).

The spelling of 22122220120021 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty million, one hundred twenty thousand, twenty-one".