2021202010123 has 4 divisors (see below), whose sum is σ = 2070499620168. Its totient is φ = 1971904400080.

The previous prime is 2021202010067. The next prime is 2021202010129. The reversal of 2021202010123 is 3210102021202.

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 2021202010123 - 2⁹ = 2021202009611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021202010097 and 2021202010106.

It is not an unprimeable number, because it can be changed into a prime (2021202010129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24648804961 + ... + 24648805042.

It is an arithmetic number, because the mean of its divisors is an integer number (517624905042).

Almost surely, 2^{2021202010123} is an apocalyptic number.

2021202010123 is a deficient number, since it is larger than the sum of its proper divisors (49297610045).

2021202010123 is an equidigital number, since it uses as much as digits as its factorization.

2021202010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49297610044.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2021202010123 its reverse (3210102021202), we get a palindrome (5231304031325).

The spelling of 2021202010123 in words is "two trillion, twenty-one billion, two hundred two million, ten thousand, one hundred twenty-three".