1001111123212 has 6 divisors (see below), whose sum is σ = 1751944465628. Its totient is φ = 500555561604.

The previous prime is 1001111123191. The next prime is 1001111123249. The reversal of 1001111123212 is 2123211111001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125138890398 + ... + 125138890405.

Almost surely, 2^{1001111123212} is an apocalyptic number.

It is an amenable number.

1001111123212 is a deficient number, since it is larger than the sum of its proper divisors (750833342416).

1001111123212 is a wasteful number, since it uses less digits than its factorization.

1001111123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250277780807 (or 250277780805 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1001111123212 its reverse (2123211111001), we get a palindrome (3124322234213).

The spelling of 1001111123212 in words is "one trillion, one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred twelve".