21222032320987 has 8 divisors (see below), whose sum is σ = 22476879680832. Its totient is φ = 19967906352000.

The previous prime is 21222032320981. The next prime is 21222032321003. The reversal of 21222032320987 is 78902323022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222032320987 - 2⁷ = 21222032320859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222032320981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180287139 + ... + 180404812.

It is an arithmetic number, because the mean of its divisors is an integer number (2809609960104).

Almost surely, 2^{21222032320987} is an apocalyptic number.

21222032320987 is a deficient number, since it is larger than the sum of its proper divisors (1254847359845).

21222032320987 is a wasteful number, since it uses less digits than its factorization.

21222032320987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360695429.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 21222032320987 in words is "twenty-one trillion, two hundred twenty-two billion, thirty-two million, three hundred twenty thousand, nine hundred eighty-seven".