11312202012421 has 4 divisors (see below), whose sum is σ = 11312345630700. Its totient is φ = 11312058394144.

The previous prime is 11312202012403. The next prime is 11312202012493. The reversal of 11312202012421 is 12421020221311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2365752321 + 11309836260100 = 48639^2 + 3363010^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312202012421 - 2²⁹ = 11311665141509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11312202012392 and 11312202012401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312202018421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71690926 + ... + 71848543.

It is an arithmetic number, because the mean of its divisors is an integer number (2828086407675).

Almost surely, 2^{11312202012421} is an apocalyptic number.

It is an amenable number.

11312202012421 is a deficient number, since it is larger than the sum of its proper divisors (143618279).

11312202012421 is an equidigital number, since it uses as much as digits as its factorization.

11312202012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143618278.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 11312202012421 its reverse (12421020221311), we get a palindrome (23733222233732).

The spelling of 11312202012421 in words is "eleven trillion, three hundred twelve billion, two hundred two million, twelve thousand, four hundred twenty-one".