20110331121 has 8 divisors (see below), whose sum is σ = 27467769504. Its totient is φ = 13079890080.

The previous prime is 20110331119. The next prime is 20110331147. The reversal of 20110331121 is 12113301102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20110331121 - 2¹ = 20110331119 is a prime.

It is a super-2 number, since 2×20110331121² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20110331121.

It is not an unprimeable number, because it can be changed into a prime (20110331161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81749191 + ... + 81749436.

It is an arithmetic number, because the mean of its divisors is an integer number (3433471188).

Almost surely, 2^20110331121 is an apocalyptic number.

It is an amenable number.

20110331121 is a deficient number, since it is larger than the sum of its proper divisors (7357438383).

20110331121 is a wasteful number, since it uses less digits than its factorization.

20110331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163498671.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20110331121 its reverse (12113301102), we get a palindrome (32223632223).

The spelling of 20110331121 in words is "twenty billion, one hundred ten million, three hundred thirty-one thousand, one hundred twenty-one".