10312142221 has 2 divisors, whose sum is σ = 10312142222. Its totient is φ = 10312142220.

The previous prime is 10312142209. The next prime is 10312142237. The reversal of 10312142221 is 12224121301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5429626596 + 4882515625 = 73686^2 + 69875^2 .

It is a cyclic number.

It is not a de Polignac number, because 10312142221 - 2¹⁵ = 10312109453 is a prime.

It is a super-2 number, since 2×10312142221² (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 (10312140221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156071110 + 5156071111.

It is an arithmetic number, because the mean of its divisors is an integer number (5156071111).

Almost surely, 2^10312142221 is an apocalyptic number.

It is an amenable number.

10312142221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10312142221 is an equidigital number, since it uses as much as digits as its factorization.

10312142221 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 19.

Adding to 10312142221 its reverse (12224121301), we get a palindrome (22536263522).

The spelling of 10312142221 in words is "ten billion, three hundred twelve million, one hundred forty-two thousand, two hundred twenty-one".