21121334334 has 40 divisors (see below), whose sum is σ = 47347663968. Its totient is φ = 7037435520.

The previous prime is 21121334291. The next prime is 21121334341. The reversal of 21121334334 is 43343312112.

It is a happy number.

21121334334 is a `hidden beast` number, since 2 + 11 + 213 + 3 + 433 + 4 = 666.

It is a super-2 number, since 2×21121334334² (a number of 21 digits) contains 22 as substring.

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 = 21121334298 and 21121334307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 369774 + ... + 423054.

Almost surely, 2^21121334334 is an apocalyptic number.

21121334334 is an abundant number, since it is smaller than the sum of its proper divisors (26226329634).

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

21121334334 is a wasteful number, since it uses less digits than its factorization.

21121334334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55742 (or 55733 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 21121334334 its reverse (43343312112), we get a palindrome (64464646446).

The spelling of 21121334334 in words is "twenty-one billion, one hundred twenty-one million, three hundred thirty-four thousand, three hundred thirty-four".