21214026552242 has 32 divisors (see below), whose sum is σ = 32647158961200. Its totient is φ = 10332445696000.

The previous prime is 21214026552233. The next prime is 21214026552253. The reversal of 21214026552242 is 24225562041212.

It can be written as a sum of positive squares in 8 ways, for example, as 2743723903561 + 18470302648681 = 1656419^2 + 4297709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21214026552196 and 21214026552205.

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, 145518884 + ... + 145664592.

Almost surely, 2^{21214026552242} is an apocalyptic number.

21214026552242 is a deficient number, since it is larger than the sum of its proper divisors (11433132408958).

21214026552242 is a wasteful number, since it uses less digits than its factorization.

21214026552242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148462.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 21214026552242 its reverse (24225562041212), we get a palindrome (45439588593454).

The spelling of 21214026552242 in words is "twenty-one trillion, two hundred fourteen billion, twenty-six million, five hundred fifty-two thousand, two hundred forty-two".