21214402411240 has 16 divisors (see below), whose sum is σ = 47732405425380. Its totient is φ = 8485760964480.

The previous prime is 21214402411231. The next prime is 21214402411271. The reversal of 21214402411240 is 4211420441212.

It can be written as a sum of positive squares in 2 ways, for example, as 20763277942276 + 451124468964 = 4556674^2 + 671658^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21214402411199 and 21214402411208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265180030101 + ... + 265180030180.

Almost surely, 2^{21214402411240} is an apocalyptic number.

21214402411240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214402411240 is an abundant number, since it is smaller than the sum of its proper divisors (26518003014140).

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

21214402411240 is a wasteful number, since it uses less digits than its factorization.

21214402411240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530360060292 (or 530360060288 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 21214402411240 its reverse (4211420441212), we get a palindrome (25425822852452).

The spelling of 21214402411240 in words is "twenty-one trillion, two hundred fourteen billion, four hundred two million, four hundred eleven thousand, two hundred forty".