212021123113 has 4 divisors (see below), whose sum is σ = 212025642880. Its totient is φ = 212016603348.

The previous prime is 212021123087. The next prime is 212021123183. The reversal of 212021123113 is 311321120212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021123113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021123183) 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, 2188773 + ... + 2283586.

It is an arithmetic number, because the mean of its divisors is an integer number (53006410720).

Almost surely, 2^212021123113 is an apocalyptic number.

It is an amenable number.

212021123113 is a deficient number, since it is larger than the sum of its proper divisors (4519767).

212021123113 is an equidigital number, since it uses as much as digits as its factorization.

212021123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519766.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212021123113 its reverse (311321120212), we get a palindrome (523342243325).

The spelling of 212021123113 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, one hundred thirteen".