2001022010123 has 4 divisors (see below), whose sum is σ = 2001048364680. Its totient is φ = 2000995655568.

The previous prime is 2001022010087. The next prime is 2001022010129. The reversal of 2001022010123 is 3210102201002.

It is a happy number.

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 2001022010123 - 2⁶ = 2001022010059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001022010098 and 2001022010107.

It is not an unprimeable number, because it can be changed into a prime (2001022010129) 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, 13063058 + ... + 13215351.

It is an arithmetic number, because the mean of its divisors is an integer number (500262091170).

Almost surely, 2^{2001022010123} is an apocalyptic number.

2001022010123 is a deficient number, since it is larger than the sum of its proper divisors (26354557).

2001022010123 is an equidigital number, since it uses as much as digits as its factorization.

2001022010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26354556.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2001022010123 its reverse (3210102201002), we get a palindrome (5211124211125).

The spelling of 2001022010123 in words is "two trillion, one billion, twenty-two million, ten thousand, one hundred twenty-three".