11122152421 has 4 divisors (see below), whose sum is σ = 11232272844. Its totient is φ = 11012032000.

The previous prime is 11122152407. The next prime is 11122152479. The reversal of 11122152421 is 12425122111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12425122111 = 101 ⋅123021011.

It can be written as a sum of positive squares in 2 ways, for example, as 7791592900 + 3330559521 = 88270^2 + 57711^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122152421 - 2¹¹ = 11122150373 is a prime.

It is a super-2 number, since 2×11122152421² (a number of 21 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 = 11122152392 and 11122152401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122152491) 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, 55060060 + ... + 55060261.

It is an arithmetic number, because the mean of its divisors is an integer number (2808068211).

Almost surely, 2^11122152421 is an apocalyptic number.

It is an amenable number.

11122152421 is a deficient number, since it is larger than the sum of its proper divisors (110120423).

11122152421 is a wasteful number, since it uses less digits than its factorization.

11122152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110120422.

The product of its digits is 320, while the sum is 22.

Adding to 11122152421 its reverse (12425122111), we get a palindrome (23547274532).

The spelling of 11122152421 in words is "eleven billion, one hundred twenty-two million, one hundred fifty-two thousand, four hundred twenty-one".