1223055345021 has 4 divisors (see below), whose sum is σ = 1630740460032. Its totient is φ = 815370230012.

The previous prime is 1223055345013. The next prime is 1223055345089. The reversal of 1223055345021 is 1205435503221.

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 1223055345021 - 2³ = 1223055345013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223055341021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203842557501 + ... + 203842557506.

It is an arithmetic number, because the mean of its divisors is an integer number (407685115008).

Almost surely, 2^{1223055345021} is an apocalyptic number.

It is an amenable number.

1223055345021 is a deficient number, since it is larger than the sum of its proper divisors (407685115011).

1223055345021 is an equidigital number, since it uses as much as digits as its factorization.

1223055345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407685115010.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 1223055345021 in words is "one trillion, two hundred twenty-three billion, fifty-five million, three hundred forty-five thousand, twenty-one".