13012001021 has 16 divisors (see below), whose sum is σ = 13841792640. Its totient is φ = 12196915200.

The previous prime is 13012001003. The next prime is 13012001029. The reversal of 13012001021 is 12010021031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13012001021 is a prime.

It is a super-4 number, since 4×13012001021⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13012000993 and 13012001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012001029) 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, 3131081 + ... + 3135233.

It is an arithmetic number, because the mean of its divisors is an integer number (865112040).

Almost surely, 2^13012001021 is an apocalyptic number.

It is an amenable number.

13012001021 is a deficient number, since it is larger than the sum of its proper divisors (829791619).

13012001021 is a wasteful number, since it uses less digits than its factorization.

13012001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 13012001021 its reverse (12010021031), we get a palindrome (25022022052).

The spelling of 13012001021 in words is "thirteen billion, twelve million, one thousand, twenty-one".