111211212321210 has 64 divisors (see below), whose sum is σ = 268385297491584. Its totient is φ = 29492062560000.

The previous prime is 111211212321161. The next prime is 111211212321217. The reversal of 111211212321210 is 12123212112111.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111211212321217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713972557 + ... + 714128303.

It is an arithmetic number, because the mean of its divisors is an integer number (4193520273306).

Almost surely, 2^{111211212321210} is an apocalyptic number.

111211212321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111211212321210 is an abundant number, since it is smaller than the sum of its proper divisors (157174085170374).

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

111211212321210 is a wasteful number, since it uses less digits than its factorization.

111211212321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287439.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 111211212321210 its reverse (12123212112111), we get a palindrome (123334424433321).

The spelling of 111211212321210 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twelve million, three hundred twenty-one thousand, two hundred ten".