101023121281 has 2 divisors, whose sum is σ = 101023121282. Its totient is φ = 101023121280.

The previous prime is 101023121267. The next prime is 101023121291. The reversal of 101023121281 is 182121320101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80692924225 + 20330197056 = 284065^2 + 142584^2 .

It is a cyclic number.

It is not a de Polignac number, because 101023121281 - 2⁹ = 101023120769 is a prime.

It is a super-2 number, since 2×101023121281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101023121291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50511560640 + 50511560641.

It is an arithmetic number, because the mean of its divisors is an integer number (50511560641).

Almost surely, 2^101023121281 is an apocalyptic number.

It is an amenable number.

101023121281 is a deficient number, since it is larger than the sum of its proper divisors (1).

101023121281 is an equidigital number, since it uses as much as digits as its factorization.

101023121281 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 22.

Adding to 101023121281 its reverse (182121320101), we get a palindrome (283144441382).

The spelling of 101023121281 in words is "one hundred one billion, twenty-three million, one hundred twenty-one thousand, two hundred eighty-one".