10113012121 has 4 divisors (see below), whose sum is σ = 10116439732. Its totient is φ = 10109584512.

The previous prime is 10113012103. The next prime is 10113012131. The reversal of 10113012121 is 12121031101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2966000521 + 7147011600 = 54461^2 + 84540^2 .

It is a cyclic number.

It is not a de Polignac number, because 10113012121 - 2⁹ = 10113011609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10113012131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709376 + ... + 1715281.

It is an arithmetic number, because the mean of its divisors is an integer number (2529109933).

Almost surely, 2^10113012121 is an apocalyptic number.

It is an amenable number.

10113012121 is a deficient number, since it is larger than the sum of its proper divisors (3427611).

10113012121 is an equidigital number, since it uses as much as digits as its factorization.

10113012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427610.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10113012121 its reverse (12121031101), we get a palindrome (22234043222).

The spelling of 10113012121 in words is "ten billion, one hundred thirteen million, twelve thousand, one hundred twenty-one".