202012010210123 has 4 divisors (see below), whose sum is σ = 210795141088848. Its totient is φ = 193228879331400.

The previous prime is 202012010210041. The next prime is 202012010210141. The reversal of 202012010210123 is 321012010210202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202012010210123 is a prime.

It is a super-2 number, since 2×202012010210123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202012010210323) 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, 4391565439328 + ... + 4391565439373.

It is an arithmetic number, because the mean of its divisors is an integer number (52698785272212).

Almost surely, 2^{202012010210123} is an apocalyptic number.

202012010210123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

202012010210123 is a deficient number, since it is larger than the sum of its proper divisors (8783130878725).

202012010210123 is an equidigital number, since it uses as much as digits as its factorization.

202012010210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8783130878724.

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

Adding to 202012010210123 its reverse (321012010210202), we get a palindrome (523024020420325).

The spelling of 202012010210123 in words is "two hundred two trillion, twelve billion, ten million, two hundred ten thousand, one hundred twenty-three".