21221522340350 has 144 divisors (see below), whose sum is σ = 42671902502016. Its totient is φ = 7848813504000.

The previous prime is 21221522340331. The next prime is 21221522340371. The reversal of 21221522340350 is 5304322512212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 290307305 + ... + 290380395.

It is an arithmetic number, because the mean of its divisors is an integer number (296332656264).

Almost surely, 2^{21221522340350} is an apocalyptic number.

21221522340350 is an abundant number, since it is smaller than the sum of its proper divisors (21450380161666).

21221522340350 is a wasteful number, since it uses less digits than its factorization.

21221522340350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73491 (or 73469 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21221522340350 its reverse (5304322512212), we get a palindrome (26525844852562).

The spelling of 21221522340350 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred twenty-two million, three hundred forty thousand, three hundred fifty".