1351221011601 has 4 divisors (see below), whose sum is σ = 1801628015472. Its totient is φ = 900814007732.

The previous prime is 1351221011587. The next prime is 1351221011629. The reversal of 1351221011601 is 1061101221531.

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 1351221011601 - 2⁷ = 1351221011473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1351221011201) 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, 225203501931 + ... + 225203501936.

It is an arithmetic number, because the mean of its divisors is an integer number (450407003868).

Almost surely, 2^{1351221011601} is an apocalyptic number.

It is an amenable number.

1351221011601 is a deficient number, since it is larger than the sum of its proper divisors (450407003871).

1351221011601 is an equidigital number, since it uses as much as digits as its factorization.

1351221011601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450407003870.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 1351221011601 in words is "one trillion, three hundred fifty-one billion, two hundred twenty-one million, eleven thousand, six hundred one".