222100021102061 has 2 divisors, whose sum is σ = 222100021102062. Its totient is φ = 222100021102060.

The previous prime is 222100021102049. The next prime is 222100021102081. The reversal of 222100021102061 is 160201120001222.

It is an a-pointer prime, because the next prime (222100021102081) can be obtained adding 222100021102061 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124377029478025 + 97722991624036 = 11152445^2 + 9885494^2 .

It is a cyclic number.

It is not a de Polignac number, because 222100021102061 - 2²² = 222100016907757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222100021102081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111050010551030 + 111050010551031.

It is an arithmetic number, because the mean of its divisors is an integer number (111050010551031).

Almost surely, 2^{222100021102061} is an apocalyptic number.

It is an amenable number.

222100021102061 is a deficient number, since it is larger than the sum of its proper divisors (1).

222100021102061 is an equidigital number, since it uses as much as digits as its factorization.

222100021102061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 222100021102061 its reverse (160201120001222), we get a palindrome (382301141103283).

The spelling of 222100021102061 in words is "two hundred twenty-two trillion, one hundred billion, twenty-one million, one hundred two thousand, sixty-one".