2002011020123 has 4 divisors (see below), whose sum is σ = 2002704480240. Its totient is φ = 2001317560008.

The previous prime is 2002011020071. The next prime is 2002011020137. The reversal of 2002011020123 is 3210201102002.

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 2002011020123 - 2⁶ = 2002011020059 is a prime.

It is a super-2 number, since 2×2002011020123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002011020098 and 2002011020107.

It is not an unprimeable number, because it can be changed into a prime (2002011020323) 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, 346725728 + ... + 346731501.

It is an arithmetic number, because the mean of its divisors is an integer number (500676120060).

Almost surely, 2^{2002011020123} is an apocalyptic number.

2002011020123 is a deficient number, since it is larger than the sum of its proper divisors (693460117).

2002011020123 is an equidigital number, since it uses as much as digits as its factorization.

2002011020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693460116.

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

Adding to 2002011020123 its reverse (3210201102002), we get a palindrome (5212212122125).

The spelling of 2002011020123 in words is "two trillion, two billion, eleven million, twenty thousand, one hundred twenty-three".