10121021121 has 4 divisors (see below), whose sum is σ = 13494694832. Its totient is φ = 6747347412.

The previous prime is 10121021087. The next prime is 10121021149. The reversal of 10121021121 is 12112012101.

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 not a de Polignac number, because 10121021121 - 2¹⁷ = 10120890049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121021097 and 10121021106.

It is not an unprimeable number, because it can be changed into a prime (10121021021) 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, 1686836851 + ... + 1686836856.

It is an arithmetic number, because the mean of its divisors is an integer number (3373673708).

Almost surely, 2^10121021121 is an apocalyptic number.

It is an amenable number.

10121021121 is a deficient number, since it is larger than the sum of its proper divisors (3373673711).

10121021121 is an equidigital number, since it uses as much as digits as its factorization.

10121021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373673710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10121021121 its reverse (12112012101), we get a palindrome (22233033222).

The spelling of 10121021121 in words is "ten billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".