10031121277 has 2 divisors, whose sum is σ = 10031121278. Its totient is φ = 10031121276.

The previous prime is 10031121263. The next prime is 10031121323. The reversal of 10031121277 is 77212113001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9782396836 + 248724441 = 98906^2 + 15771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10031121277 is a prime.

It is a super-2 number, since 2×10031121277² (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 (10031128277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015560638 + 5015560639.

It is an arithmetic number, because the mean of its divisors is an integer number (5015560639).

Almost surely, 2^10031121277 is an apocalyptic number.

It is an amenable number.

10031121277 is a deficient number, since it is larger than the sum of its proper divisors (1).

10031121277 is an equidigital number, since it uses as much as digits as its factorization.

10031121277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

Adding to 10031121277 its reverse (77212113001), we get a palindrome (87243234278).

The spelling of 10031121277 in words is "ten billion, thirty-one million, one hundred twenty-one thousand, two hundred seventy-seven".