21402240042132 has 96 divisors (see below), whose sum is σ = 61843418179200. Its totient is φ = 6361037277696.

The previous prime is 21402240042121. The next prime is 21402240042137. The reversal of 21402240042132 is 23124004220412.

It is a happy number.

21402240042132 is a `hidden beast` number, since 2 + 1 + 40 + 2 + 2 + 400 + 4 + 213 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21402240042096 and 21402240042105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402240042137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306728103 + ... + 306797870.

It is an arithmetic number, because the mean of its divisors is an integer number (644202272700).

Almost surely, 2^{21402240042132} is an apocalyptic number.

It is an amenable number.

21402240042132 is an abundant number, since it is smaller than the sum of its proper divisors (40441178137068).

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

21402240042132 is a wasteful number, since it uses less digits than its factorization.

21402240042132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613526022 (or 613526014 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21402240042132 its reverse (23124004220412), we get a palindrome (44526244262544).

The spelling of 21402240042132 in words is "twenty-one trillion, four hundred two billion, two hundred forty million, forty-two thousand, one hundred thirty-two".