21021222414 has 32 divisors (see below), whose sum is σ = 43251646464. Its totient is φ = 6808108320.

The previous prime is 21021222403. The next prime is 21021222427. The reversal of 21021222414 is 41422212012.

It is a congruent number.

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, 288142 + ... + 353649.

It is an arithmetic number, because the mean of its divisors is an integer number (1351613952).

Almost surely, 2^21021222414 is an apocalyptic number.

21021222414 is an abundant number, since it is smaller than the sum of its proper divisors (22230424050).

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

21021222414 is a wasteful number, since it uses less digits than its factorization.

21021222414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641952.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21021222414 its reverse (41422212012), we get a palindrome (62443434426).

The spelling of 21021222414 in words is "twenty-one billion, twenty-one million, two hundred twenty-two thousand, four hundred fourteen".