10121223123121 has 4 divisors (see below), whose sum is σ = 11041334316144. Its totient is φ = 9201111930100.

The previous prime is 10121223123101. The next prime is 10121223123197. The reversal of 10121223123121 is 12132132212101.

It is a happy number.

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 10121223123121 - 2²³ = 10121214734513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121223123092 and 10121223123101.

It is not an unprimeable number, because it can be changed into a prime (10121223123101) 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, 460055596495 + ... + 460055596516.

It is an arithmetic number, because the mean of its divisors is an integer number (2760333579036).

Almost surely, 2^{10121223123121} is an apocalyptic number.

10121223123121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121223123121 is a deficient number, since it is larger than the sum of its proper divisors (920111193023).

10121223123121 is an equidigital number, since it uses as much as digits as its factorization.

10121223123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920111193022.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 10121223123121 its reverse (12132132212101), we get a palindrome (22253355335222).

The spelling of 10121223123121 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred twenty-one".