21215210114 has 32 divisors (see below), whose sum is σ = 38353336320. Its totient is φ = 8597888208.

The previous prime is 21215210047. The next prime is 21215210117. The reversal of 21215210114 is 41101251212.

It is not an unprimeable number, because it can be changed into a prime (21215210117) 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, 72599 + ... + 218405.

It is an arithmetic number, because the mean of its divisors is an integer number (1198541760).

Almost surely, 2^21215210114 is an apocalyptic number.

21215210114 is a deficient number, since it is larger than the sum of its proper divisors (17138126206).

21215210114 is a wasteful number, since it uses less digits than its factorization.

21215210114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146382.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 21215210114 its reverse (41101251212), we get a palindrome (62316461326).

The spelling of 21215210114 in words is "twenty-one billion, two hundred fifteen million, two hundred ten thousand, one hundred fourteen".