1001001111222 has 32 divisors (see below), whose sum is σ = 2289459089664. Its totient is φ = 285818248800.

The previous prime is 1001001111203. The next prime is 1001001111223. The reversal of 1001001111222 is 2221111001001.

It is a junction number, because it is equal to n+sod(n) for n = 1001001111198 and 1001001111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001001111223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7519429 + ... + 7651392.

It is an arithmetic number, because the mean of its divisors is an integer number (71545596552).

Almost surely, 2^{1001001111222} is an apocalyptic number.

1001001111222 is an abundant number, since it is smaller than the sum of its proper divisors (1288457978442).

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

1001001111222 is a wasteful number, since it uses less digits than its factorization.

1001001111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15172404.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001001111222 its reverse (2221111001001), we get a palindrome (3222112112223).

The spelling of 1001001111222 in words is "one trillion, one billion, one million, one hundred eleven thousand, two hundred twenty-two".