1222212211002 has 20 divisors (see below), whose sum is σ = 2738660695386. Its totient is φ = 407404070280.

The previous prime is 1222212210953. The next prime is 1222212211043. The reversal of 1222212211002 is 2001122122221.

It is a happy number.

1222212211002 is a `hidden beast` number, since 122 + 221 + 221 + 100 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1222083819441 + 128391561 = 1105479^2 + 11331^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3772259749 + ... + 3772260072.

Almost surely, 2^{1222212211002} is an apocalyptic number.

1222212211002 is an abundant number, since it is smaller than the sum of its proper divisors (1516448484384).

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

1222212211002 is an equidigital number, since it uses as much as digits as its factorization.

1222212211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544519835 (or 7544519826 counting only the distinct ones).

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

Adding to 1222212211002 its reverse (2001122122221), we get a palindrome (3223334333223).

The spelling of 1222212211002 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred eleven thousand, two".