212121111100222 has 8 divisors (see below), whose sum is σ = 325581240293496. Its totient is φ = 103594031002392.

The previous prime is 212121111100189. The next prime is 212121111100243. The reversal of 212121111100222 is 222001111121212.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212121111100222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233262273753 + ... + 1233262273924.

It is an arithmetic number, because the mean of its divisors is an integer number (40697655036687).

Almost surely, 2^{212121111100222} is an apocalyptic number.

212121111100222 is a deficient number, since it is larger than the sum of its proper divisors (113460129193274).

212121111100222 is a wasteful number, since it uses less digits than its factorization.

212121111100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466524547722.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212121111100222 its reverse (222001111121212), we get a palindrome (434122222221434).

The spelling of 212121111100222 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred twenty-two".