111212211201 has 32 divisors (see below), whose sum is σ = 183367123968. Its totient is φ = 58383339840.

The previous prime is 111212211161. The next prime is 111212211241. The reversal of 111212211201 is 102112212111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111212211161) and next prime (111212211241).

It is not a de Polignac number, because 111212211201 - 2¹⁹ = 111211686913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212211241) 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, 907731 + ... + 1022936.

It is an arithmetic number, because the mean of its divisors is an integer number (5730222624).

Almost surely, 2^111212211201 is an apocalyptic number.

It is an amenable number.

111212211201 is a deficient number, since it is larger than the sum of its proper divisors (72154912767).

111212211201 is a wasteful number, since it uses less digits than its factorization.

111212211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930901.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111212211201 its reverse (102112212111), we get a palindrome (213324423312).

The spelling of 111212211201 in words is "one hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred one".