1221113152370 has 32 divisors (see below), whose sum is σ = 2295492089472. Its totient is φ = 466816780672.

The previous prime is 1221113152307. The next prime is 1221113152387. The reversal of 1221113152370 is 732513111221.

It is a happy number.

It is a super-2 number, since 2×1221113152370² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1950752 + ... + 2499531.

It is an arithmetic number, because the mean of its divisors is an integer number (71734127796).

Almost surely, 2^{1221113152370} is an apocalyptic number.

1221113152370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221113152370 is a deficient number, since it is larger than the sum of its proper divisors (1074378937102).

1221113152370 is a wasteful number, since it uses less digits than its factorization.

1221113152370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451506.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 1221113152370 its reverse (732513111221), we get a palindrome (1953626263591).

The spelling of 1221113152370 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, one hundred fifty-two thousand, three hundred seventy".