20111030230121 has 4 divisors (see below), whose sum is σ = 20111040164052. Its totient is φ = 20111020296192.

The previous prime is 20111030230037. The next prime is 20111030230129. The reversal of 20111030230121 is 12103203011102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13946789011600 + 6164241218521 = 3734540^2 + 2482789^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111030230121 - 2²² = 20111026035817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111030230121.

It is not an unprimeable number, because it can be changed into a prime (20111030230129) 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, 719540 + ... + 6382773.

It is an arithmetic number, because the mean of its divisors is an integer number (5027760041013).

Almost surely, 2^{20111030230121} is an apocalyptic number.

It is an amenable number.

20111030230121 is a deficient number, since it is larger than the sum of its proper divisors (9933931).

20111030230121 is an equidigital number, since it uses as much as digits as its factorization.

20111030230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933930.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20111030230121 its reverse (12103203011102), we get a palindrome (32214233241223).

The spelling of 20111030230121 in words is "twenty trillion, one hundred eleven billion, thirty million, two hundred thirty thousand, one hundred twenty-one".