10421223121 has 2 divisors, whose sum is σ = 10421223122. Its totient is φ = 10421223120.

The previous prime is 10421223101. The next prime is 10421223133. The reversal of 10421223121 is 12132212401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6285318400 + 4135904721 = 79280^2 + 64311^2 .

It is a cyclic number.

It is not a de Polignac number, because 10421223121 - 2¹⁷ = 10421092049 is a prime.

It is not a weakly prime, because it can be changed into another prime (10421223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210611560 + 5210611561.

It is an arithmetic number, because the mean of its divisors is an integer number (5210611561).

Almost surely, 2^10421223121 is an apocalyptic number.

It is an amenable number.

10421223121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10421223121 is an equidigital number, since it uses as much as digits as its factorization.

10421223121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 10421223121 its reverse (12132212401), we get a palindrome (22553435522).

The spelling of 10421223121 in words is "ten billion, four hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-one".