10211123121 has 16 divisors (see below), whose sum is σ = 13845274560. Its totient is φ = 6692310720.

The previous prime is 10211123071. The next prime is 10211123177. The reversal of 10211123121 is 12132111201.

It is not a de Polignac number, because 10211123121 - 2⁹ = 10211122609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211123121.

It is not an unprimeable number, because it can be changed into a prime (10211123191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362110 + ... + 389288.

It is an arithmetic number, because the mean of its divisors is an integer number (865329660).

Almost surely, 2^10211123121 is an apocalyptic number.

It is an amenable number.

10211123121 is a deficient number, since it is larger than the sum of its proper divisors (3634151439).

10211123121 is a wasteful number, since it uses less digits than its factorization.

10211123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29296.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 10211123121 its reverse (12132111201), we get a palindrome (22343234322).

The spelling of 10211123121 in words is "ten billion, two hundred eleven million, one hundred twenty-three thousand, one hundred twenty-one".