21021333414 has 128 divisors (see below), whose sum is σ = 46298926080. Its totient is φ = 6342336000.

The previous prime is 21021333413. The next prime is 21021333451. The reversal of 21021333414 is 41433312012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021333413) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52950264 + ... + 52950660.

It is an arithmetic number, because the mean of its divisors is an integer number (361710360).

Almost surely, 2^21021333414 is an apocalyptic number.

21021333414 is an abundant number, since it is smaller than the sum of its proper divisors (25277592666).

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

21021333414 is a wasteful number, since it uses less digits than its factorization.

21021333414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21021333414 its reverse (41433312012), we get a palindrome (62454645426).

The spelling of 21021333414 in words is "twenty-one billion, twenty-one million, three hundred thirty-three thousand, four hundred fourteen".