1321215055123 has 8 divisors (see below), whose sum is σ = 1324679706288. Its totient is φ = 1317752577024.

The previous prime is 1321215055087. The next prime is 1321215055129. The reversal of 1321215055123 is 3215505121231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321215055123 - 2³³ = 1312625120531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321215055129) 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, 677911 + ... + 1761247.

It is an arithmetic number, because the mean of its divisors is an integer number (165584963286).

Almost surely, 2^{1321215055123} is an apocalyptic number.

1321215055123 is a deficient number, since it is larger than the sum of its proper divisors (3464651165).

1321215055123 is a wasteful number, since it uses less digits than its factorization.

1321215055123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086533.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 1321215055123 in words is "one trillion, three hundred twenty-one billion, two hundred fifteen million, fifty-five thousand, one hundred twenty-three".