12221462550 has 48 divisors (see below), whose sum is σ = 33064615872. Its totient is φ = 2962778400.

The previous prime is 12221462531. The next prime is 12221462579. The reversal of 12221462550 is 5526412221.

It is a super-2 number, since 2×12221462550² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3701824 + ... + 3705123.

It is an arithmetic number, because the mean of its divisors is an integer number (688846164).

Almost surely, 2^12221462550 is an apocalyptic number.

12221462550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221462550 is an abundant number, since it is smaller than the sum of its proper divisors (20843153322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221462550 is a wasteful number, since it uses less digits than its factorization.

12221462550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406973 (or 7406968 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 12221462550 its reverse (5526412221), we get a palindrome (17747874771).

The spelling of 12221462550 in words is "twelve billion, two hundred twenty-one million, four hundred sixty-two thousand, five hundred fifty".