2212212113531 has 4 divisors (see below), whose sum is σ = 2528242415472. Its totient is φ = 1896181811592.

The previous prime is 2212212113521. The next prime is 2212212113537. The reversal of 2212212113531 is 1353112122122.

It is a happy number.

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 2212212113531 - 2¹⁰ = 2212212112507 is a prime.

It is a super-2 number, since 2×2212212113531² (a number of 25 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 2212212113531.

It is not an unprimeable number, because it can be changed into a prime (2212212113537) 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, 158015150960 + ... + 158015150973.

It is an arithmetic number, because the mean of its divisors is an integer number (632060603868).

Almost surely, 2^{2212212113531} is an apocalyptic number.

2212212113531 is a deficient number, since it is larger than the sum of its proper divisors (316030301941).

2212212113531 is an equidigital number, since it uses as much as digits as its factorization.

2212212113531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316030301940.

The product of its digits is 1440, while the sum is 26.

Adding to 2212212113531 its reverse (1353112122122), we get a palindrome (3565324235653).

The spelling of 2212212113531 in words is "two trillion, two hundred twelve billion, two hundred twelve million, one hundred thirteen thousand, five hundred thirty-one".