1322121444 has 48 divisors (see below), whose sum is σ = 3620953728. Its totient is φ = 367538688.

The previous prime is 1322121419. The next prime is 1322121457. The reversal of 1322121444 is 4441212231.

It is a super-2 number, since 2×1322121444² = 3496010225369290272, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 209589 + ... + 215804.

It is an arithmetic number, because the mean of its divisors is an integer number (75436536).

Almost surely, 2^1322121444 is an apocalyptic number.

1322121444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1322121444 is an abundant number, since it is smaller than the sum of its proper divisors (2298832284).

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

1322121444 is a wasteful number, since it uses less digits than its factorization.

1322121444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425444 (or 425442 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 1322121444 is about 36360.9879403737. The cubic root of 1322121444 is about 1097.5486580648.

Adding to 1322121444 its reverse (4441212231), we get a palindrome (5763333675).

The spelling of 1322121444 in words is "one billion, three hundred twenty-two million, one hundred twenty-one thousand, four hundred forty-four".