10121621 has 2 divisors, whose sum is σ = 10121622. Its totient is φ = 10121620.

The previous prime is 10121611. The next prime is 10121651. The reversal of 10121621 is 12612101.

10121621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 2907025 = 2686^2 + 1705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121596 and 10121605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060810 + 5060811.

It is an arithmetic number, because the mean of its divisors is an integer number (5060811).

Almost surely, 2^10121621 is an apocalyptic number.

It is an amenable number.

10121621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121621 is an equidigital number, since it uses as much as digits as its factorization.

10121621 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 14.

The square root of 10121621 is about 3181.4495124078. The cubic root of 10121621 is about 216.3133668867.

Adding to 10121621 its reverse (12612101), we get a palindrome (22733722).

The spelling of 10121621 in words is "ten million, one hundred twenty-one thousand, six hundred twenty-one".