1221134445352 has 16 divisors (see below), whose sum is σ = 2289967044660. Its totient is φ = 610476566784.

The previous prime is 1221134445263. The next prime is 1221134445389. The reversal of 1221134445352 is 2535444311221.

It can be written as a sum of positive squares in 2 ways, for example, as 1113265552996 + 107868892356 = 1055114^2 + 328434^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11274723 + ... + 11382514.

Almost surely, 2^{1221134445352} is an apocalyptic number.

It is an amenable number.

1221134445352 is a deficient number, since it is larger than the sum of its proper divisors (1068832599308).

1221134445352 is a wasteful number, since it uses less digits than its factorization.

1221134445352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22663980 (or 22663976 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

Adding to 1221134445352 its reverse (2535444311221), we get a palindrome (3756578756573).

The spelling of 1221134445352 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-four million, four hundred forty-five thousand, three hundred fifty-two".