1211212100222 has 8 divisors (see below), whose sum is σ = 1861130788272. Its totient is φ = 590835170800.

The previous prime is 1211212100171. The next prime is 1211212100233. The reversal of 1211212100222 is 2220012121121.

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 1211212100222.

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, 7385439554 + ... + 7385439717.

It is an arithmetic number, because the mean of its divisors is an integer number (232641348534).

Almost surely, 2^{1211212100222} is an apocalyptic number.

1211212100222 is a deficient number, since it is larger than the sum of its proper divisors (649918688050).

1211212100222 is a wasteful number, since it uses less digits than its factorization.

1211212100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14770879314.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211212100222 its reverse (2220012121121), we get a palindrome (3431224221343).

The spelling of 1211212100222 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred thousand, two hundred twenty-two".