1301321021021 has 16 divisors (see below), whose sum is σ = 1553535307008. Its totient is φ = 1065787641600.

The previous prime is 1301321021017. The next prime is 1301321021041. The reversal of 1301321021021 is 1201201231031.

It is a cyclic number.

It is not a de Polignac number, because 1301321021021 - 2² = 1301321021017 is a prime.

It is a super-2 number, since 2×1301321021021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301321021041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4143260 + ... + 4446261.

It is an arithmetic number, because the mean of its divisors is an integer number (97095956688).

Almost surely, 2^{1301321021021} is an apocalyptic number.

It is an amenable number.

1301321021021 is a deficient number, since it is larger than the sum of its proper divisors (252214285987).

1301321021021 is an equidigital number, since it uses as much as digits as its factorization.

1301321021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8590492.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1301321021021 its reverse (1201201231031), we get a palindrome (2502522252052).

The spelling of 1301321021021 in words is "one trillion, three hundred one billion, three hundred twenty-one million, twenty-one thousand, twenty-one".