111212210121211 has 8 divisors (see below), whose sum is σ = 111301792694720. Its totient is φ = 111122663553792.

The previous prime is 111212210121209. The next prime is 111212210121247. The reversal of 111212210121211 is 112121012212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111212210121211 - 2¹ = 111212210121209 is a prime.

It is a super-3 number, since 3×111212210121211³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212210121011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2819916 + ... + 15178153.

It is an arithmetic number, because the mean of its divisors is an integer number (13912724086840).

Almost surely, 2^{111212210121211} is an apocalyptic number.

111212210121211 is a deficient number, since it is larger than the sum of its proper divisors (89582573509).

111212210121211 is a wasteful number, since it uses less digits than its factorization.

111212210121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18003045.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111212210121211 its reverse (112121012212111), we get a palindrome (223333222333322).

The spelling of 111212210121211 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".