22121511055 has 16 divisors (see below), whose sum is σ = 30650840640. Its totient is φ = 15012652032.

The previous prime is 22121511043. The next prime is 22121511077. The reversal of 22121511055 is 55011512122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-22121511055 is a prime.

It is a super-2 number, since 2×22121511055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3254560 + ... + 3261349.

It is an arithmetic number, because the mean of its divisors is an integer number (1915677540).

Almost surely, 2^22121511055 is an apocalyptic number.

22121511055 is a deficient number, since it is larger than the sum of its proper divisors (8529329585).

22121511055 is an equidigital number, since it uses as much as digits as its factorization.

22121511055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516018.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 22121511055 in words is "twenty-two billion, one hundred twenty-one million, five hundred eleven thousand, fifty-five".