111202243141221 has 32 divisors (see below), whose sum is σ = 165397132581120. Its totient is φ = 73841038774272.

The previous prime is 111202243141217. The next prime is 111202243141277. The reversal of 111202243141221 is 122141342202111.

111202243141221 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 0 + 2 + 2 + 431 + 4 + 1 + 221 = 666.

It is not a de Polignac number, because 111202243141221 - 2² = 111202243141217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202243141291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42887461 + ... + 45406373.

It is an arithmetic number, because the mean of its divisors is an integer number (5168660393160).

Almost surely, 2^{111202243141221} is an apocalyptic number.

It is an amenable number.

111202243141221 is a deficient number, since it is larger than the sum of its proper divisors (54194889439899).

111202243141221 is a wasteful number, since it uses less digits than its factorization.

111202243141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525402 (or 2525396 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 111202243141221 its reverse (122141342202111), we get a palindrome (233343585343332).

The spelling of 111202243141221 in words is "one hundred eleven trillion, two hundred two billion, two hundred forty-three million, one hundred forty-one thousand, two hundred twenty-one".