1351221242045 has 16 divisors (see below), whose sum is σ = 1680176213760. Its totient is φ = 1042472942784.

The previous prime is 1351221242027. The next prime is 1351221242069. The reversal of 1351221242045 is 5402421221531.

It is a cyclic number.

It is not a de Polignac number, because 1351221242045 - 2³⁸ = 1076343335101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39759914 + ... + 39793883.

It is an arithmetic number, because the mean of its divisors is an integer number (105011013360).

Almost surely, 2^{1351221242045} is an apocalyptic number.

It is an amenable number.

1351221242045 is a deficient number, since it is larger than the sum of its proper divisors (328954971715).

1351221242045 is an equidigital number, since it uses as much as digits as its factorization.

1351221242045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79553924.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1351221242045 its reverse (5402421221531), we get a palindrome (6753642463576).

The spelling of 1351221242045 in words is "one trillion, three hundred fifty-one billion, two hundred twenty-one million, two hundred forty-two thousand, forty-five".