10122021121 has 4 divisors (see below), whose sum is σ = 10134533700. Its totient is φ = 10109508544.

The previous prime is 10122021109. The next prime is 10122021139. The reversal of 10122021121 is 12112022101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12112022101 = 45403 ⋅266767.

It can be written as a sum of positive squares in 2 ways, for example, as 4294836225 + 5827184896 = 65535^2 + 76336^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122021121 - 2⁵ = 10122021089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10122021521) 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, 6255076 + ... + 6256693.

It is an arithmetic number, because the mean of its divisors is an integer number (2533633425).

Almost surely, 2^10122021121 is an apocalyptic number.

It is an amenable number.

10122021121 is a deficient number, since it is larger than the sum of its proper divisors (12512579).

10122021121 is an equidigital number, since it uses as much as digits as its factorization.

10122021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12512578.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10122021121 its reverse (12112022101), we get a palindrome (22234043222).

The spelling of 10122021121 in words is "ten billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".