10200112121 has 4 divisors (see below), whose sum is σ = 10343775744. Its totient is φ = 10056448500.

The previous prime is 10200112103. The next prime is 10200112123. The reversal of 10200112121 is 12121100201.

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 a de Polignac number, because none of the positive numbers 2^k-10200112121 is a prime.

It is a super-2 number, since 2×10200112121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10200112123) 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, 71831705 + ... + 71831846.

It is an arithmetic number, because the mean of its divisors is an integer number (2585943936).

Almost surely, 2^10200112121 is an apocalyptic number.

It is an amenable number.

10200112121 is a deficient number, since it is larger than the sum of its proper divisors (143663623).

10200112121 is an equidigital number, since it uses as much as digits as its factorization.

10200112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143663622.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10200112121 its reverse (12121100201), we get a palindrome (22321212322).

The spelling of 10200112121 in words is "ten billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".