1222532421 has 16 divisors (see below), whose sum is σ = 1787174400. Its totient is φ = 737201520.

The previous prime is 1222532413. The next prime is 1222532477. The reversal of 1222532421 is 1242352221.

It is not a de Polignac number, because 1222532421 - 2³ = 1222532413 is a prime.

It is a super-2 number, since 2×1222532421² = 2989171040792242482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222532391 and 1222532400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222532401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86515 + ... + 99648.

It is an arithmetic number, because the mean of its divisors is an integer number (111698400).

Almost surely, 2^1222532421 is an apocalyptic number.

1222532421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222532421 is a deficient number, since it is larger than the sum of its proper divisors (564641979).

1222532421 is a wasteful number, since it uses less digits than its factorization.

1222532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186376.

The product of its digits is 1920, while the sum is 24.

The square root of 1222532421 is about 34964.7311014971. The cubic root of 1222532421 is about 1069.2685544592.

Adding to 1222532421 its reverse (1242352221), we get a palindrome (2464884642).

The spelling of 1222532421 in words is "one billion, two hundred twenty-two million, five hundred thirty-two thousand, four hundred twenty-one".