30131211121 has 8 divisors (see below), whose sum is σ = 32914661184. Its totient is φ = 27355135920.

The previous prime is 30131211119. The next prime is 30131211127. The reversal of 30131211121 is 12111213103.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30131211121 - 2¹ = 30131211119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30131211095 and 30131211104.

It is not an unprimeable number, because it can be changed into a prime (30131211127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1835166 + ... + 1851511.

It is an arithmetic number, because the mean of its divisors is an integer number (4114332648).

Almost surely, 2^30131211121 is an apocalyptic number.

It is an amenable number.

30131211121 is a deficient number, since it is larger than the sum of its proper divisors (2783450063).

30131211121 is a wasteful number, since it uses less digits than its factorization.

30131211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687431.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 30131211121 its reverse (12111213103), we get a palindrome (42242424224).

The spelling of 30131211121 in words is "thirty billion, one hundred thirty-one million, two hundred eleven thousand, one hundred twenty-one".