1012123202171 has 2 divisors, whose sum is σ = 1012123202172. Its totient is φ = 1012123202170.

The previous prime is 1012123202149. The next prime is 1012123202177. The reversal of 1012123202171 is 1712023212101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012123202171 - 2⁶ = 1012123202107 is a prime.

It is a super-2 number, since 2×1012123202171² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1012123202177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506061601085 + 506061601086.

It is an arithmetic number, because the mean of its divisors is an integer number (506061601086).

Almost surely, 2^{1012123202171} is an apocalyptic number.

1012123202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012123202171 is an equidigital number, since it uses as much as digits as its factorization.

1012123202171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 1012123202171 its reverse (1712023212101), we get a palindrome (2724146414272).

The spelling of 1012123202171 in words is "one trillion, twelve billion, one hundred twenty-three million, two hundred two thousand, one hundred seventy-one".