11455422121 has 32 divisors (see below), whose sum is σ = 13713598080. Its totient is φ = 9432192000.

The previous prime is 11455422101. The next prime is 11455422133. The reversal of 11455422121 is 12122455411.

It is not a de Polignac number, because 11455422121 - 2⁵ = 11455422089 is a prime.

It is a super-2 number, since 2×11455422121² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11455422121.

It is not an unprimeable number, because it can be changed into a prime (11455422101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1628550 + ... + 1635568.

It is an arithmetic number, because the mean of its divisors is an integer number (428549940).

Almost surely, 2^11455422121 is an apocalyptic number.

11455422121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11455422121 is a deficient number, since it is larger than the sum of its proper divisors (2258175959).

11455422121 is a wasteful number, since it uses less digits than its factorization.

11455422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257.

The product of its digits is 3200, while the sum is 28.

Adding to 11455422121 its reverse (12122455411), we get a palindrome (23577877532).

The spelling of 11455422121 in words is "eleven billion, four hundred fifty-five million, four hundred twenty-two thousand, one hundred twenty-one".