21611236052214 has 32 divisors (see below), whose sum is σ = 50849967183840. Its totient is φ = 6779995623936.

The previous prime is 21611236052173. The next prime is 21611236052243. The reversal of 21611236052214 is 41225063211612.

21611236052214 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 1 + 23 + 605 + 2 + 21 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11770824819 + ... + 11770826654.

It is an arithmetic number, because the mean of its divisors is an integer number (1589061474495).

Almost surely, 2^{21611236052214} is an apocalyptic number.

21611236052214 is an abundant number, since it is smaller than the sum of its proper divisors (29238731131626).

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

21611236052214 is a wasteful number, since it uses less digits than its factorization.

21611236052214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23541651501 (or 23541651495 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 21611236052214 its reverse (41225063211612), we get a palindrome (62836299263826).

The spelling of 21611236052214 in words is "twenty-one trillion, six hundred eleven billion, two hundred thirty-six million, fifty-two thousand, two hundred fourteen".