1375351260021 has 12 divisors (see below), whose sum is σ = 1991337300940. Its totient is φ = 914722925760.

The previous prime is 1375351260007. The next prime is 1375351260091. The reversal of 1375351260021 is 1200621535731.

1375351260021 is a `hidden beast` number, since 1 + 3 + 7 + 5 + 35 + 12 + 600 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 476721202500 + 898630057521 = 690450^2 + 947961^2 .

It is not a de Polignac number, because 1375351260021 - 2⁶ = 1375351259957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375351260091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181488856 + ... + 181496433.

Almost surely, 2^{1375351260021} is an apocalyptic number.

It is an amenable number.

1375351260021 is a deficient number, since it is larger than the sum of its proper divisors (615986040919).

1375351260021 is a wasteful number, since it uses less digits than its factorization.

1375351260021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362985716 (or 362985713 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

Adding to 1375351260021 its reverse (1200621535731), we get a palindrome (2575972795752).

The spelling of 1375351260021 in words is "one trillion, three hundred seventy-five billion, three hundred fifty-one million, two hundred sixty thousand, twenty-one".