221331221030 has 64 divisors (see below), whose sum is σ = 437090437440. Its totient is φ = 80319934464.

The previous prime is 221331221003. The next prime is 221331221093. The reversal of 221331221030 is 30122133122.

It is a junction number, because it is equal to n+sod(n) for n = 221331220993 and 221331221011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3005429 + ... + 3078191.

It is an arithmetic number, because the mean of its divisors is an integer number (6829538085).

Almost surely, 2^221331221030 is an apocalyptic number.

221331221030 is a deficient number, since it is larger than the sum of its proper divisors (215759216410).

221331221030 is a wasteful number, since it uses less digits than its factorization.

221331221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73433.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221331221030 its reverse (30122133122), we get a palindrome (251453354152).

The spelling of 221331221030 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, thirty".