10121121287 has 2 divisors, whose sum is σ = 10121121288. Its totient is φ = 10121121286.

The previous prime is 10121121253. The next prime is 10121121317. The reversal of 10121121287 is 78212112101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10121121287 - 2⁶ = 10121121223 is a prime.

It is a super-2 number, since 2×10121121287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060560643 + 5060560644.

It is an arithmetic number, because the mean of its divisors is an integer number (5060560644).

Almost surely, 2^10121121287 is an apocalyptic number.

10121121287 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121121287 is an equidigital number, since it uses as much as digits as its factorization.

10121121287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 10121121287 its reverse (78212112101), we get a palindrome (88333233388).

The spelling of 10121121287 in words is "ten billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred eighty-seven".