21240200135214 has 32 divisors (see below), whose sum is σ = 47618147809440. Its totient is φ = 7017411252096.

The previous prime is 21240200135159. The next prime is 21240200135233. The reversal of 21240200135214 is 41253100204212.

21240200135214 is a `hidden beast` number, since 2 + 1 + 240 + 200 + 1 + 3 + 5 + 214 = 666.

It is a super-2 number, since 2×21240200135214² (a number of 27 digits) contains 22 as substring.

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

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, 1740423277 + ... + 1740435480.

It is an arithmetic number, because the mean of its divisors is an integer number (1488067119045).

Almost surely, 2^{21240200135214} is an apocalyptic number.

21240200135214 is an abundant number, since it is smaller than the sum of its proper divisors (26377947674226).

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

21240200135214 is a wasteful number, since it uses less digits than its factorization.

21240200135214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480858881 (or 3480858875 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21240200135214 its reverse (41253100204212), we get a palindrome (62493300339426).

The spelling of 21240200135214 in words is "twenty-one trillion, two hundred forty billion, two hundred million, one hundred thirty-five thousand, two hundred fourteen".