2021201012123 has 4 divisors (see below), whose sum is σ = 2021205615000. Its totient is φ = 2021196409248.

The previous prime is 2021201012099. The next prime is 2021201012147. The reversal of 2021201012123 is 3212101021202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2021201012099) and next prime (2021201012147).

It is a cyclic number.

It is not a de Polignac number, because 2021201012123 - 2²⁰ = 2021199963547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021201012153) 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, 1563998 + ... + 2547251.

It is an arithmetic number, because the mean of its divisors is an integer number (505301403750).

Almost surely, 2^{2021201012123} is an apocalyptic number.

2021201012123 is a deficient number, since it is larger than the sum of its proper divisors (4602877).

2021201012123 is an equidigital number, since it uses as much as digits as its factorization.

2021201012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602876.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2021201012123 its reverse (3212101021202), we get a palindrome (5233302033325).

The spelling of 2021201012123 in words is "two trillion, twenty-one billion, two hundred one million, twelve thousand, one hundred twenty-three".