30111212131 has 16 divisors (see below), whose sum is σ = 40429041408. Its totient is φ = 21658413600.

The previous prime is 30111212129. The next prime is 30111212147. The reversal of 30111212131 is 13121211103.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30111212131 - 2¹ = 30111212129 is a prime.

It is a super-2 number, since 2×30111212131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30111212161) 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, 15039565 + ... + 15041566.

It is an arithmetic number, because the mean of its divisors is an integer number (2526815088).

Almost surely, 2^30111212131 is an apocalyptic number.

30111212131 is a deficient number, since it is larger than the sum of its proper divisors (10317829277).

30111212131 is a wasteful number, since it uses less digits than its factorization.

30111212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30081162.

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

Adding to 30111212131 its reverse (13121211103), we get a palindrome (43232423234).

It can be divided in two parts, 30111 and 212131, that added together give a palindrome (242242).

The spelling of 30111212131 in words is "thirty billion, one hundred eleven million, two hundred twelve thousand, one hundred thirty-one".