21121332141242 has 8 divisors (see below), whose sum is σ = 33545645165556. Its totient is φ = 9939450419392.

The previous prime is 21121332141233. The next prime is 21121332141263. The reversal of 21121332141242 is 24214123312112.

It can be written as a sum of positive squares in 2 ways, for example, as 21069210794641 + 52121346601 = 4590121^2 + 228301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21121332141242² (a number of 27 digits) contains 22 as substring.

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, 310607825573 + ... + 310607825640.

Almost surely, 2^{21121332141242} is an apocalyptic number.

21121332141242 is a deficient number, since it is larger than the sum of its proper divisors (12424313024314).

21121332141242 is a wasteful number, since it uses less digits than its factorization.

21121332141242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621215651232.

The product of its digits is 4608, while the sum is 29.

Adding to 21121332141242 its reverse (24214123312112), we get a palindrome (45335455453354).

The spelling of 21121332141242 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty-two million, one hundred forty-one thousand, two hundred forty-two".