72276343121 has 4 divisors (see below), whose sum is σ = 76080361200. Its totient is φ = 68472325044.

The previous prime is 72276343079. The next prime is 72276343133. The reversal of 72276343121 is 12134367227.

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 a cyclic number.

It is not a de Polignac number, because 72276343121 - 2¹⁰ = 72276342097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72276343021) 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, 1902009011 + ... + 1902009048.

It is an arithmetic number, because the mean of its divisors is an integer number (19020090300).

Almost surely, 2^72276343121 is an apocalyptic number.

It is an amenable number.

72276343121 is a deficient number, since it is larger than the sum of its proper divisors (3804018079).

72276343121 is a wasteful number, since it uses less digits than its factorization.

72276343121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804018078.

The product of its digits is 84672, while the sum is 38.

The spelling of 72276343121 in words is "seventy-two billion, two hundred seventy-six million, three hundred forty-three thousand, one hundred twenty-one".