1211112221002 has 16 divisors (see below), whose sum is σ = 1845643514112. Its totient is φ = 595915958880.

The previous prime is 1211112220999. The next prime is 1211112221003. The reversal of 1211112221002 is 2001222111121.

It is not an unprimeable number, because it can be changed into a prime (1211112221003) 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, 4427323 + ... + 4692910.

It is an arithmetic number, because the mean of its divisors is an integer number (115352719632).

Almost surely, 2^{1211112221002} is an apocalyptic number.

1211112221002 is a deficient number, since it is larger than the sum of its proper divisors (634531293110).

1211112221002 is an equidigital number, since it uses as much as digits as its factorization.

1211112221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9121293.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211112221002 its reverse (2001222111121), we get a palindrome (3212334332123).

The spelling of 1211112221002 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two".