1222120201553 has 4 divisors (see below), whose sum is σ = 1222201958208. Its totient is φ = 1222038444900.

The previous prime is 1222120201543. The next prime is 1222120201609. The reversal of 1222120201553 is 3551020212221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222120201553 - 2²⁸ = 1221851766097 is a prime.

It is a super-2 number, since 2×1222120201553² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222120201543) by changing a digit.

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, 40855901 + ... + 40885802.

It is an arithmetic number, because the mean of its divisors is an integer number (305550489552).

Almost surely, 2^{1222120201553} is an apocalyptic number.

It is an amenable number.

1222120201553 is a deficient number, since it is larger than the sum of its proper divisors (81756655).

1222120201553 is an equidigital number, since it uses as much as digits as its factorization.

1222120201553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81756654.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 1222120201553 its reverse (3551020212221), we get a palindrome (4773140413774).

The spelling of 1222120201553 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred one thousand, five hundred fifty-three".