211221230232 has 64 divisors (see below), whose sum is σ = 550706688000. Its totient is φ = 67433425920.

The previous prime is 211221230177. The next prime is 211221230257. The reversal of 211221230232 is 232032122112.

It is a super-2 number, since 2×211221230232² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221230199 and 211221230208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391232 + ... + 1535567.

It is an arithmetic number, because the mean of its divisors is an integer number (8604792000).

Almost surely, 2^211221230232 is an apocalyptic number.

It is an amenable number.

211221230232 is an abundant number, since it is smaller than the sum of its proper divisors (339485457768).

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

211221230232 is a wasteful number, since it uses less digits than its factorization.

211221230232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926936 (or 2926932 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 211221230232 its reverse (232032122112), we get a palindrome (443253352344).

The spelling of 211221230232 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred thirty thousand, two hundred thirty-two".