212012201123 has 4 divisors (see below), whose sum is σ = 212702794920. Its totient is φ = 211321607328.

The previous prime is 212012201113. The next prime is 212012201129. The reversal of 212012201123 is 321102210212.

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 212012201123 - 2⁶ = 212012201059 is a prime.

It is a super-2 number, since 2×212012201123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212012201129) 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, 345296438 + ... + 345297051.

It is an arithmetic number, because the mean of its divisors is an integer number (53175698730).

Almost surely, 2^212012201123 is an apocalyptic number.

212012201123 is a deficient number, since it is larger than the sum of its proper divisors (690593797).

212012201123 is an equidigital number, since it uses as much as digits as its factorization.

212012201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690593796.

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

Adding to 212012201123 its reverse (321102210212), we get a palindrome (533114411335).

The spelling of 212012201123 in words is "two hundred twelve billion, twelve million, two hundred one thousand, one hundred twenty-three".