2123455643001 has 36 divisors (see below), whose sum is σ = 3892345417584. Its totient is φ = 1103093838000.

The previous prime is 2123455642969. The next prime is 2123455643077. The reversal of 2123455643001 is 1003465543212.

2123455643001 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 4 + 5 + 5 + 643 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 2123455643001 - 2⁵ = 2123455642969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2123455644001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 218862975 + ... + 218872676.

It is an arithmetic number, because the mean of its divisors is an integer number (108120706044).

Almost surely, 2^{2123455643001} is an apocalyptic number.

2123455643001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2123455643001 is a deficient number, since it is larger than the sum of its proper divisors (1768889774583).

2123455643001 is a wasteful number, since it uses less digits than its factorization.

2123455643001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437735682 (or 437735672 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 2123455643001 in words is "two trillion, one hundred twenty-three billion, four hundred fifty-five million, six hundred forty-three thousand, one".