11312110210021 has 4 divisors (see below), whose sum is σ = 11312138869612. Its totient is φ = 11312081550432.

The previous prime is 11312110210013. The next prime is 11312110210109. The reversal of 11312110210021 is 12001201121311.

It is a happy number.

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 6097788196900 + 5214322013121 = 2469370^2 + 2283489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312110210021 - 2³ = 11312110210013 is a prime.

It is a super-2 number, since 2×11312110210021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11312110209977 and 11312110210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312120210021) 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, 13729350 + ... + 14529943.

It is an arithmetic number, because the mean of its divisors is an integer number (2828034717403).

Almost surely, 2^{11312110210021} is an apocalyptic number.

It is an amenable number.

11312110210021 is a deficient number, since it is larger than the sum of its proper divisors (28659591).

11312110210021 is an equidigital number, since it uses as much as digits as its factorization.

11312110210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28659590.

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

Adding to 11312110210021 its reverse (12001201121311), we get a palindrome (23313311331332).

The spelling of 11312110210021 in words is "eleven trillion, three hundred twelve billion, one hundred ten million, two hundred ten thousand, twenty-one".