111211012202121 has 96 divisors (see below), whose sum is σ = 176799867753600. Its totient is φ = 66946746240000.

The previous prime is 111211012202099. The next prime is 111211012202137. The reversal of 111211012202121 is 121202210112111.

It is a happy number.

111211012202121 is a `hidden beast` number, since 11 + 121 + 101 + 220 + 212 + 1 = 666.

It is not a de Polignac number, because 111211012202121 - 2²¹ = 111211010104969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111211012202094 and 111211012202103.

It is not an unprimeable number, because it can be changed into a prime (111211012202321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5852893621 + ... + 5852912621.

It is an arithmetic number, because the mean of its divisors is an integer number (1841665289100).

Almost surely, 2^{111211012202121} is an apocalyptic number.

It is an amenable number.

111211012202121 is a deficient number, since it is larger than the sum of its proper divisors (65588855551479).

111211012202121 is a wasteful number, since it uses less digits than its factorization.

111211012202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24247 (or 24244 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111211012202121 its reverse (121202210112111), we get a palindrome (232413222314232).

The spelling of 111211012202121 in words is "one hundred eleven trillion, two hundred eleven billion, twelve million, two hundred two thousand, one hundred twenty-one".