212311320030 has 48 divisors (see below), whose sum is σ = 552080992320. Its totient is φ = 56609012544.

The previous prime is 212311319963. The next prime is 212311320041. The reversal of 212311320030 is 30023113212.

212311320030 is a `hidden beast` number, since 2 + 1 + 2 + 311 + 320 + 0 + 30 = 666.

It is a super-2 number, since 2×212311320030² (a number of 23 digits) contains 22 as substring.

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 = 212311319985 and 212311320012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 563764 + ... + 861656.

It is an arithmetic number, because the mean of its divisors is an integer number (11501687340).

Almost surely, 2^212311320030 is an apocalyptic number.

212311320030 is an abundant number, since it is smaller than the sum of its proper divisors (339769672290).

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

212311320030 is a wasteful number, since it uses less digits than its factorization.

212311320030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305825 (or 305822 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 212311320030 its reverse (30023113212), we get a palindrome (242334433242).

The spelling of 212311320030 in words is "two hundred twelve billion, three hundred eleven million, three hundred twenty thousand, thirty".