10031120221 has 2 divisors, whose sum is σ = 10031120222. Its totient is φ = 10031120220.

The previous prime is 10031120219. The next prime is 10031120237. The reversal of 10031120221 is 12202113001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7079371321 + 2951748900 = 84139^2 + 54330^2 .

It is a cyclic number.

It is not a de Polignac number, because 10031120221 - 2¹ = 10031120219 is a prime.

Together with 10031120219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10031120621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015560110 + 5015560111.

It is an arithmetic number, because the mean of its divisors is an integer number (5015560111).

Almost surely, 2^10031120221 is an apocalyptic number.

It is an amenable number.

10031120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10031120221 is an equidigital number, since it uses as much as digits as its factorization.

10031120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10031120221 its reverse (12202113001), we get a palindrome (22233233222).

The spelling of 10031120221 in words is "ten billion, thirty-one million, one hundred twenty thousand, two hundred twenty-one".