21333514421 has 12 divisors (see below), whose sum is σ = 23000508768. Its totient is φ = 19778903232.

The previous prime is 21333514403. The next prime is 21333514439. The reversal of 21333514421 is 12441533312.

It is an interprime number because it is at equal distance from previous prime (21333514403) and next prime (21333514439).

It is not a de Polignac number, because 21333514421 - 2⁶ = 21333514357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333514481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 531521 + ... + 570246.

It is an arithmetic number, because the mean of its divisors is an integer number (1916709064).

Almost surely, 2^21333514421 is an apocalyptic number.

It is an amenable number.

21333514421 is a deficient number, since it is larger than the sum of its proper divisors (1666994347).

21333514421 is a wasteful number, since it uses less digits than its factorization.

21333514421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101868 (or 1101851 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The spelling of 21333514421 in words is "twenty-one billion, three hundred thirty-three million, five hundred fourteen thousand, four hundred twenty-one".