42120211223017 has 2 divisors, whose sum is σ = 42120211223018. Its totient is φ = 42120211223016.

The previous prime is 42120211223003. The next prime is 42120211223081. The reversal of 42120211223017 is 71032211202124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34649987507776 + 7470223715241 = 5886424^2 + 2733171^2 .

It is a cyclic number.

It is not a de Polignac number, because 42120211223017 - 2¹⁵ = 42120211190249 is a prime.

It is a super-2 number, since 2×42120211223017² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42120211221017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060105611508 + 21060105611509.

It is an arithmetic number, because the mean of its divisors is an integer number (21060105611509).

Almost surely, 2^{42120211223017} is an apocalyptic number.

It is an amenable number.

42120211223017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120211223017 is an equidigital number, since it uses as much as digits as its factorization.

42120211223017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 42120211223017 in words is "forty-two trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-three thousand, seventeen".