202101010123 has 4 divisors (see below), whose sum is σ = 202939603768. Its totient is φ = 201262416480.

The previous prime is 202101010081. The next prime is 202101010169. The reversal of 202101010123 is 321010101202.

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 202101010123 - 2¹³ = 202101001931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202101017123) 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, 419296461 + ... + 419296942.

It is an arithmetic number, because the mean of its divisors is an integer number (50734900942).

Almost surely, 2^202101010123 is an apocalyptic number.

202101010123 is a deficient number, since it is larger than the sum of its proper divisors (838593645).

202101010123 is an equidigital number, since it uses as much as digits as its factorization.

202101010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838593644.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 202101010123 its reverse (321010101202), we get a palindrome (523111111325).

The spelling of 202101010123 in words is "two hundred two billion, one hundred one million, ten thousand, one hundred twenty-three".