222121222031 has 2 divisors, whose sum is σ = 222121222032. Its totient is φ = 222121222030.

The previous prime is 222121222019. The next prime is 222121222033. The reversal of 222121222031 is 130222121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121222031 - 2⁶ = 222121221967 is a prime.

It is a super-2 number, since 2×222121222031² (a number of 23 digits) contains 22 as substring.

Together with 222121222033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222121221994 and 222121222012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121222033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060611015 + 111060611016.

It is an arithmetic number, because the mean of its divisors is an integer number (111060611016).

Almost surely, 2^222121222031 is an apocalyptic number.

222121222031 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121222031 is an equidigital number, since it uses as much as digits as its factorization.

222121222031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222121222031 its reverse (130222121222), we get a palindrome (352343343253).

The spelling of 222121222031 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, thirty-one".