21321023221032 has 32 divisors (see below), whose sum is σ = 53302687569600. Its totient is φ = 7106990471424.

The previous prime is 21321023221021. The next prime is 21321023221067. The reversal of 21321023221032 is 23012232012312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21321023220993 and 21321023221011.

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, 12480144 + ... + 14085312.

It is an arithmetic number, because the mean of its divisors is an integer number (1665708986550).

Almost surely, 2^{21321023221032} is an apocalyptic number.

It is an amenable number.

21321023221032 is an abundant number, since it is smaller than the sum of its proper divisors (31981664348568).

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

21321023221032 is a wasteful number, since it uses less digits than its factorization.

21321023221032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158625 (or 2158621 counting only the distinct ones).

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

Adding to 21321023221032 its reverse (23012232012312), we get a palindrome (44333255233344).

The spelling of 21321023221032 in words is "twenty-one trillion, three hundred twenty-one billion, twenty-three million, two hundred twenty-one thousand, thirty-two".