211223133030 has 64 divisors (see below), whose sum is σ = 623920647168. Its totient is φ = 44565759360.

The previous prime is 211223133029. The next prime is 211223133059. The reversal of 211223133030 is 30331322112.

211223133030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211223132988 and 211223133006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38682826 + ... + 38688285.

It is an arithmetic number, because the mean of its divisors is an integer number (9748760112).

Almost surely, 2^211223133030 is an apocalyptic number.

211223133030 is an abundant number, since it is smaller than the sum of its proper divisors (412697514138).

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

211223133030 is a wasteful number, since it uses less digits than its factorization.

211223133030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77371141.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 211223133030 its reverse (30331322112), we get a palindrome (241554455142).

The spelling of 211223133030 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred thirty-three thousand, thirty".