212120001013 has 4 divisors (see below), whose sum is σ = 213471083980. Its totient is φ = 210768918048.

The previous prime is 212120000999. The next prime is 212120001031. The reversal of 212120001013 is 310100021212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57181722129 + 154938278884 = 239127^2 + 393622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120001013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212120000984 and 212120001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120001073) 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, 675541248 + ... + 675541561.

It is an arithmetic number, because the mean of its divisors is an integer number (53367770995).

Almost surely, 2^212120001013 is an apocalyptic number.

It is an amenable number.

212120001013 is a deficient number, since it is larger than the sum of its proper divisors (1351082967).

212120001013 is a wasteful number, since it uses less digits than its factorization.

212120001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351082966.

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

Adding to 212120001013 its reverse (310100021212), we get a palindrome (522220022225).

The spelling of 212120001013 in words is "two hundred twelve billion, one hundred twenty million, one thousand, thirteen".