1100031212421 has 12 divisors (see below), whose sum is σ = 1594010443948. Its totient is φ = 731011155264.

The previous prime is 1100031212353. The next prime is 1100031212431. The reversal of 1100031212421 is 1242121300011.

1100031212421 is a `hidden beast` number, since 1 + 1 + 0 + 0 + 0 + 31 + 212 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10564961796 + 1089466250625 = 102786^2 + 1043775^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1100031212421 is a prime.

It is a super-3 number, since 3×1100031212421³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1100031212394 and 1100031212403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100031212431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195245890 + ... + 195251523.

Almost surely, 2^{1100031212421} is an apocalyptic number.

It is an amenable number.

1100031212421 is a deficient number, since it is larger than the sum of its proper divisors (493979231527).

1100031212421 is a wasteful number, since it uses less digits than its factorization.

1100031212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390497732 (or 390497729 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1100031212421 its reverse (1242121300011), we get a palindrome (2342152512432).

The spelling of 1100031212421 in words is "one trillion, one hundred billion, thirty-one million, two hundred twelve thousand, four hundred twenty-one".