201115262121 has 16 divisors (see below), whose sum is σ = 268446177600. Its totient is φ = 133930672128.

The previous prime is 201115262087. The next prime is 201115262147. The reversal of 201115262121 is 121262511102.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-201115262121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201115262091 and 201115262100.

It is not an unprimeable number, because it can be changed into a prime (201115262191) 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, 13463985 + ... + 13478913.

It is an arithmetic number, because the mean of its divisors is an integer number (16777886100).

Almost surely, 2^201115262121 is an apocalyptic number.

It is an amenable number.

201115262121 is a deficient number, since it is larger than the sum of its proper divisors (67330915479).

201115262121 is a wasteful number, since it uses less digits than its factorization.

201115262121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19528.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 201115262121 its reverse (121262511102), we get a palindrome (322377773223).

The spelling of 201115262121 in words is "two hundred one billion, one hundred fifteen million, two hundred sixty-two thousand, one hundred twenty-one".