2125166035381 has 2 divisors, whose sum is σ = 2125166035382. Its totient is φ = 2125166035380.

The previous prime is 2125166035367. The next prime is 2125166035393. The reversal of 2125166035381 is 1835306615212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2051385894756 + 73780140625 = 1432266^2 + 271625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125166035381 - 2³¹ = 2123018551733 is a prime.

It is a super-2 number, since 2×2125166035381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125166035351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062583017690 + 1062583017691.

It is an arithmetic number, because the mean of its divisors is an integer number (1062583017691).

Almost surely, 2^{2125166035381} is an apocalyptic number.

It is an amenable number.

2125166035381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125166035381 is an equidigital number, since it uses as much as digits as its factorization.

2125166035381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 2125166035381 in words is "two trillion, one hundred twenty-five billion, one hundred sixty-six million, thirty-five thousand, three hundred eighty-one".