21213032223120 has 40 divisors (see below), whose sum is σ = 65760399892416. Its totient is φ = 5656808592768.

The previous prime is 21213032223017. The next prime is 21213032223133. The reversal of 21213032223120 is 2132223031212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44193816892 + ... + 44193817371.

Almost surely, 2^{21213032223120} is an apocalyptic number.

21213032223120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213032223120 is an abundant number, since it is smaller than the sum of its proper divisors (44547367669296).

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

21213032223120 is a wasteful number, since it uses less digits than its factorization.

21213032223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88387634279 (or 88387634273 counting only the distinct ones).

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

Adding to 21213032223120 its reverse (2132223031212), we get a palindrome (23345255254332).

The spelling of 21213032223120 in words is "twenty-one trillion, two hundred thirteen billion, thirty-two million, two hundred twenty-three thousand, one hundred twenty".