30131211222 has 72 divisors (see below), whose sum is σ = 78755714856. Its totient is φ = 8608910688.

The previous prime is 30131211221. The next prime is 30131211241. The reversal of 30131211222 is 22211213103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30131211195 and 30131211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131211221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 608823 + ... + 656450.

It is an arithmetic number, because the mean of its divisors is an integer number (1093829373).

Almost surely, 2^30131211222 is an apocalyptic number.

30131211222 is an abundant number, since it is smaller than the sum of its proper divisors (48624503634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30131211222 is a wasteful number, since it uses less digits than its factorization.

30131211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265304 (or 1265285 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30131211222 its reverse (22211213103), we get a palindrome (52342424325).

The spelling of 30131211222 in words is "thirty billion, one hundred thirty-one million, two hundred eleven thousand, two hundred twenty-two".