1221441024442 has 16 divisors (see below), whose sum is σ = 1939968570600. Its totient is φ = 574786050048.

The previous prime is 1221441024413. The next prime is 1221441024449. The reversal of 1221441024442 is 2444201441221.

It can be written as a sum of positive squares in 4 ways, for example, as 1220209646161 + 1231378281 = 1104631^2 + 35091^2 .

It is a super-2 number, since 2×1221441024442² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221441024449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984684 + ... + 2526232.

Almost surely, 2^{1221441024442} is an apocalyptic number.

1221441024442 is a deficient number, since it is larger than the sum of its proper divisors (718527546158).

1221441024442 is a wasteful number, since it uses less digits than its factorization.

1221441024442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607905.

The product of its (nonzero) digits is 16384, while the sum is 31.

Adding to 1221441024442 its reverse (2444201441221), we get a palindrome (3665642465663).

The spelling of 1221441024442 in words is "one trillion, two hundred twenty-one billion, four hundred forty-one million, twenty-four thousand, four hundred forty-two".