222100122221021 has 8 divisors (see below), whose sum is σ = 242291211960288. Its totient is φ = 201909060738000.

The previous prime is 222100122220993. The next prime is 222100122221023. The reversal of 222100122221021 is 120122221001222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222100122221021 - 2⁴² = 217702075709917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222100122220984 and 222100122221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100122221023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11489711 + ... + 24004451.

It is an arithmetic number, because the mean of its divisors is an integer number (30286401495036).

Almost surely, 2^{222100122221021} is an apocalyptic number.

It is an amenable number.

222100122221021 is a deficient number, since it is larger than the sum of its proper divisors (20191089739267).

222100122221021 is a wasteful number, since it uses less digits than its factorization.

222100122221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14128123.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222100122221021 its reverse (120122221001222), we get a palindrome (342222343222243).

The spelling of 222100122221021 in words is "two hundred twenty-two trillion, one hundred billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".