10012121 has 6 divisors (see below), whose sum is σ = 11646810. Its totient is φ = 8581776.

The previous prime is 10012117. The next prime is 10012141. The reversal of 10012121 is 12121001.

10012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 1225 = 3164^2 + 35^2 .

It is not a de Polignac number, because 10012121 - 2² = 10012117 is a prime.

10012121 is a modest number, since divided by 2121 gives 1001 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 10012099 and 10012108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102116 + ... + 102213.

It is an arithmetic number, because the mean of its divisors is an integer number (1941135).

Almost surely, 2^10012121 is an apocalyptic number.

It is an amenable number.

10012121 is a deficient number, since it is larger than the sum of its proper divisors (1634689).

10012121 is an equidigital number, since it uses as much as digits as its factorization.

10012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204343 (or 204336 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 10012121 is about 3164.1935781491. The cubic root of 10012121 is about 215.5304802002.

Adding to 10012121 its reverse (12121001), we get a palindrome (22133122).

It can be divided in two parts, 100 and 12121, that added together give a palindrome (12221).

The spelling of 10012121 in words is "ten million, twelve thousand, one hundred twenty-one".