10112020421 has 2 divisors, whose sum is σ = 10112020422. Its totient is φ = 10112020420.

The previous prime is 10112020397. The next prime is 10112020439. The reversal of 10112020421 is 12402021101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7675512100 + 2436508321 = 87610^2 + 49361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10112020421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10112020396 and 10112020405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10112020021) 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, 5056010210 + 5056010211.

It is an arithmetic number, because the mean of its divisors is an integer number (5056010211).

Almost surely, 2^10112020421 is an apocalyptic number.

It is an amenable number.

10112020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10112020421 is an equidigital number, since it uses as much as digits as its factorization.

10112020421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10112020421 its reverse (12402021101), we get a palindrome (22514041522).

The spelling of 10112020421 in words is "ten billion, one hundred twelve million, twenty thousand, four hundred twenty-one".