222110000020021 has 4 divisors (see below), whose sum is σ = 222145554692512. Its totient is φ = 222074445347532.

The previous prime is 222110000019997. The next prime is 222110000020037. The reversal of 222110000020021 is 120020000011222.

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 not a de Polignac number, because 222110000020021 - 2¹¹ = 222110000017973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222110000019983 and 222110000020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222110000020091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17777326875 + ... + 17777339368.

It is an arithmetic number, because the mean of its divisors is an integer number (55536388673128).

Almost surely, 2^{222110000020021} is an apocalyptic number.

It is an amenable number.

222110000020021 is a deficient number, since it is larger than the sum of its proper divisors (35554672491).

222110000020021 is an equidigital number, since it uses as much as digits as its factorization.

222110000020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35554672490.

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

Adding to 222110000020021 its reverse (120020000011222), we get a palindrome (342130000031243).

The spelling of 222110000020021 in words is "two hundred twenty-two trillion, one hundred ten billion, twenty thousand, twenty-one".