2001212013423 has 16 divisors (see below), whose sum is σ = 3114348180480. Its totient is φ = 1119218876256.

The previous prime is 2001212013421. The next prime is 2001212013433. The reversal of 2001212013423 is 3243102121002.

It is not a de Polignac number, because 2001212013423 - 2¹ = 2001212013421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2001212013423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001212013421) 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, 1013784228 + ... + 1013786201.

It is an arithmetic number, because the mean of its divisors is an integer number (194646761280).

Almost surely, 2^{2001212013423} is an apocalyptic number.

2001212013423 is a deficient number, since it is larger than the sum of its proper divisors (1113136167057).

2001212013423 is a wasteful number, since it uses less digits than its factorization.

2001212013423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027570486.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2001212013423 its reverse (3243102121002), we get a palindrome (5244314134425).

The spelling of 2001212013423 in words is "two trillion, one billion, two hundred twelve million, thirteen thousand, four hundred twenty-three".