1321125214553 has 2 divisors, whose sum is σ = 1321125214554. Its totient is φ = 1321125214552.

The previous prime is 1321125214547. The next prime is 1321125214579. The reversal of 1321125214553 is 3554125211231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876560317504 + 444564897049 = 936248^2 + 666757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321125214553 - 2¹⁶ = 1321125149017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321125214853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660562607276 + 660562607277.

It is an arithmetic number, because the mean of its divisors is an integer number (660562607277).

Almost surely, 2^{1321125214553} is an apocalyptic number.

It is an amenable number.

1321125214553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321125214553 is an equidigital number, since it uses as much as digits as its factorization.

1321125214553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The spelling of 1321125214553 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-five million, two hundred fourteen thousand, five hundred fifty-three".