10120121 has 4 divisors (see below), whose sum is σ = 11040144. Its totient is φ = 9200100.

The previous prime is 10120111. The next prime is 10120139. The reversal of 10120121 is 12102101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10120121 - 2⁶ = 10120057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120099 and 10120108.

It is not an unprimeable number, because it can be changed into a prime (10120111) 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, 459995 + ... + 460016.

It is an arithmetic number, because the mean of its divisors is an integer number (2760036).

Almost surely, 2^10120121 is an apocalyptic number.

10120121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10120121 is a deficient number, since it is larger than the sum of its proper divisors (920023).

10120121 is an equidigital number, since it uses as much as digits as its factorization.

10120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920022.

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

The square root of 10120121 is about 3181.2137620726. The cubic root of 10120121 is about 216.3026806511.

Adding to 10120121 its reverse (12102101), we get a palindrome (22222222).

The spelling of 10120121 in words is "ten million, one hundred twenty thousand, one hundred twenty-one".