10121423021 has 2 divisors, whose sum is σ = 10121423022. Its totient is φ = 10121423020.

The previous prime is 10121423003. The next prime is 10121423047. The reversal of 10121423021 is 12032412101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10118146921 + 3276100 = 100589^2 + 1810^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121423021 - 2¹⁰ = 10121421997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121423051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060711510 + 5060711511.

It is an arithmetic number, because the mean of its divisors is an integer number (5060711511).

Almost surely, 2^10121423021 is an apocalyptic number.

It is an amenable number.

10121423021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121423021 is an equidigital number, since it uses as much as digits as its factorization.

10121423021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 10121423021 its reverse (12032412101), we get a palindrome (22153835122).

The spelling of 10121423021 in words is "ten billion, one hundred twenty-one million, four hundred twenty-three thousand, twenty-one".