10111203121 has 4 divisors (see below), whose sum is σ = 10550820672. Its totient is φ = 9671585572.

The previous prime is 10111203119. The next prime is 10111203131. The reversal of 10111203121 is 12130211101.

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 10111203121 - 2¹ = 10111203119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10111203131) 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, 219808741 + ... + 219808786.

It is an arithmetic number, because the mean of its divisors is an integer number (2637705168).

Almost surely, 2^10111203121 is an apocalyptic number.

It is an amenable number.

10111203121 is a deficient number, since it is larger than the sum of its proper divisors (439617551).

10111203121 is an equidigital number, since it uses as much as digits as its factorization.

10111203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439617550.

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

Adding to 10111203121 its reverse (12130211101), we get a palindrome (22241414222).

The spelling of 10111203121 in words is "ten billion, one hundred eleven million, two hundred three thousand, one hundred twenty-one".