22111221210187 has 2 divisors, whose sum is σ = 22111221210188. Its totient is φ = 22111221210186.

The previous prime is 22111221210181. The next prime is 22111221210233. The reversal of 22111221210187 is 78101212211122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22111221210187 - 2⁷ = 22111221210059 is a prime.

It is a super-2 number, since 2×22111221210187² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22111221210181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055610605093 + 11055610605094.

It is an arithmetic number, because the mean of its divisors is an integer number (11055610605094).

Almost surely, 2^{22111221210187} is an apocalyptic number.

22111221210187 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111221210187 is an equidigital number, since it uses as much as digits as its factorization.

22111221210187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 31.

The spelling of 22111221210187 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred eighty-seven".