1001111212104 has 64 divisors (see below), whose sum is σ = 2521147944000. Its totient is φ = 331255111680.

The previous prime is 1001111212103. The next prime is 1001111212109. The reversal of 1001111212104 is 4012121111001.

It is a happy number.

It is a super-2 number, since 2×1001111212104² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001111212103) 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, 28809012 + ... + 28843740.

It is an arithmetic number, because the mean of its divisors is an integer number (39392936625).

Almost surely, 2^{1001111212104} is an apocalyptic number.

It is an amenable number.

1001111212104 is an abundant number, since it is smaller than the sum of its proper divisors (1520036731896).

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

1001111212104 is a wasteful number, since it uses less digits than its factorization.

1001111212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43518 (or 43514 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1001111212104 its reverse (4012121111001), we get a palindrome (5013232323105).

The spelling of 1001111212104 in words is "one trillion, one billion, one hundred eleven million, two hundred twelve thousand, one hundred four".