212212224251 has 4 divisors (see below), whose sum is σ = 219057779904. Its totient is φ = 205366668600.

The previous prime is 212212224241. The next prime is 212212224317. The reversal of 212212224251 is 152422212212.

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 212212224251 - 2¹⁸ = 212211962107 is a prime.

It is a super-2 number, since 2×212212224251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212212224251.

It is not an unprimeable number, because it can be changed into a prime (212212224241) 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, 3422777780 + ... + 3422777841.

It is an arithmetic number, because the mean of its divisors is an integer number (54764444976).

Almost surely, 2^212212224251 is an apocalyptic number.

212212224251 is a deficient number, since it is larger than the sum of its proper divisors (6845555653).

212212224251 is an equidigital number, since it uses as much as digits as its factorization.

212212224251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845555652.

The product of its digits is 2560, while the sum is 26.

Adding to 212212224251 its reverse (152422212212), we get a palindrome (364634436463).

The spelling of 212212224251 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty-four thousand, two hundred fifty-one".