222101220021210 has 48 divisors (see below), whose sum is σ = 578917739332296. Its totient is φ = 59077805618304.

The previous prime is 222101220021203. The next prime is 222101220021221. The reversal of 222101220021210 is 12120022101222.

It is a happy number.

222101220021210 is a `hidden beast` number, since 2 + 2 + 210 + 1 + 220 + 0 + 21 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 207242253519921 + 14858966501289 = 14395911^2 + 3854733^2 .

It is a super-3 number, since 3×222101220021210³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3108013809 + ... + 3108085268.

Almost surely, 2^{222101220021210} is an apocalyptic number.

222101220021210 is an abundant number, since it is smaller than the sum of its proper divisors (356816519311086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222101220021210 is a wasteful number, since it uses less digits than its factorization.

222101220021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216099487 (or 6216099484 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222101220021210 its reverse (12120022101222), we get a palindrome (234221242122432).

The spelling of 222101220021210 in words is "two hundred twenty-two trillion, one hundred one billion, two hundred twenty million, twenty-one thousand, two hundred ten".