2601216306021 has 4 divisors (see below), whose sum is σ = 3468288408032. Its totient is φ = 1734144204012.

The previous prime is 2601216305983. The next prime is 2601216306023. The reversal of 2601216306021 is 1206036121062.

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 not a de Polignac number, because 2601216306021 - 2⁹ = 2601216305509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2601216306021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601216306023) 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, 433536051001 + ... + 433536051006.

It is an arithmetic number, because the mean of its divisors is an integer number (867072102008).

Almost surely, 2^{2601216306021} is an apocalyptic number.

It is an amenable number.

2601216306021 is a deficient number, since it is larger than the sum of its proper divisors (867072102011).

2601216306021 is an equidigital number, since it uses as much as digits as its factorization.

2601216306021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867072102010.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 2601216306021 in words is "two trillion, six hundred one billion, two hundred sixteen million, three hundred six thousand, twenty-one".