211123430 has 16 divisors (see below), whose sum is σ = 434311200. Its totient is φ = 72385152.

The previous prime is 211123427. The next prime is 211123481. The reversal of 211123430 is 34321112.

It is a junction number, because it is equal to n+sod(n) for n = 211123399 and 211123408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507955 + ... + 1508094.

It is an arithmetic number, because the mean of its divisors is an integer number (27144450).

Almost surely, 2^211123430 is an apocalyptic number.

211123430 is an abundant number, since it is smaller than the sum of its proper divisors (223187770).

211123430 is a wasteful number, since it uses less digits than its factorization.

211123430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016063.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 211123430 is about 14530.0870609918. The cubic root of 211123430 is about 595.4502441484.

Adding to 211123430 its reverse (34321112), we get a palindrome (245444542).

It can be divided in two parts, 21112 and 3430, that added together give a palindrome (24542).

The spelling of 211123430 in words is "two hundred eleven million, one hundred twenty-three thousand, four hundred thirty".