222223211112121 has 2 divisors, whose sum is σ = 222223211112122. Its totient is φ = 222223211112120.

The previous prime is 222223211112107. The next prime is 222223211112137. The reversal of 222223211112121 is 121211112322222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221992269354025 + 230941758096 = 14899405^2 + 480564^2 .

It is a cyclic number.

It is not a de Polignac number, because 222223211112121 - 2¹¹ = 222223211110073 is a prime.

It is not a weakly prime, because it can be changed into another prime (222223211118121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111605556060 + 111111605556061.

It is an arithmetic number, because the mean of its divisors is an integer number (111111605556061).

Almost surely, 2^{222223211112121} is an apocalyptic number.

It is an amenable number.

222223211112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222223211112121 is an equidigital number, since it uses as much as digits as its factorization.

222223211112121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

Adding to 222223211112121 its reverse (121211112322222), we get a palindrome (343434323434343).

The spelling of 222223211112121 in words is "two hundred twenty-two trillion, two hundred twenty-three billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-one".