21102201186 has 32 divisors (see below), whose sum is σ = 46186452288. Its totient is φ = 6374427840.

The previous prime is 21102201181. The next prime is 21102201187. The reversal of 21102201186 is 68110220112.

It is not an unprimeable number, because it can be changed into a prime (21102201181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483385 + ... + 525228.

It is an arithmetic number, because the mean of its divisors is an integer number (1443326634).

Almost surely, 2^21102201186 is an apocalyptic number.

21102201186 is an abundant number, since it is smaller than the sum of its proper divisors (25084251102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102201186 is a wasteful number, since it uses less digits than its factorization.

21102201186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008946.

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 21102201186 its reverse (68110220112), we get a palindrome (89212421298).

The spelling of 21102201186 in words is "twenty-one billion, one hundred two million, two hundred one thousand, one hundred eighty-six".