222210100100021 has 16 divisors (see below), whose sum is σ = 245745346271040. Its totient is φ = 199238783857920.

The previous prime is 222210100099979. The next prime is 222210100100033. The reversal of 222210100100021 is 120001001012222.

222210100100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222210100100021 - 2¹⁸ = 222210099837877 is a prime.

It is a super-2 number, since 2×222210100100021² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222210100099969 and 222210100100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222210100190021) 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, 204673226 + ... + 205756043.

It is an arithmetic number, because the mean of its divisors is an integer number (15359084141940).

Almost surely, 2^{222210100100021} is an apocalyptic number.

It is an amenable number.

222210100100021 is a deficient number, since it is larger than the sum of its proper divisors (23535246171019).

222210100100021 is a wasteful number, since it uses less digits than its factorization.

222210100100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410429956.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 222210100100021 its reverse (120001001012222), we get a palindrome (342211101112243).

The spelling of 222210100100021 in words is "two hundred twenty-two trillion, two hundred ten billion, one hundred million, one hundred thousand, twenty-one".