2128223068451 has 4 divisors (see below), whose sum is σ = 2128435709400. Its totient is φ = 2128010427504.

The previous prime is 2128223068441. The next prime is 2128223068459. The reversal of 2128223068451 is 1548603228212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2128223068451 - 2¹⁰ = 2128223067427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128223068459) 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, 106305461 + ... + 106325478.

It is an arithmetic number, because the mean of its divisors is an integer number (532108927350).

Almost surely, 2^{2128223068451} is an apocalyptic number.

2128223068451 is a deficient number, since it is larger than the sum of its proper divisors (212640949).

2128223068451 is a wasteful number, since it uses less digits than its factorization.

2128223068451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212640948.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 2128223068451 in words is "two trillion, one hundred twenty-eight billion, two hundred twenty-three million, sixty-eight thousand, four hundred fifty-one".