221131022012 has 6 divisors (see below), whose sum is σ = 386979288528. Its totient is φ = 110565511004.

The previous prime is 221131021931. The next prime is 221131022069. The reversal of 221131022012 is 210220131122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27641377748 + ... + 27641377755.

It is an arithmetic number, because the mean of its divisors is an integer number (64496548088).

Almost surely, 2^221131022012 is an apocalyptic number.

It is an amenable number.

221131022012 is a deficient number, since it is larger than the sum of its proper divisors (165848266516).

221131022012 is a wasteful number, since it uses less digits than its factorization.

221131022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55282755507 (or 55282755505 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221131022012 its reverse (210220131122), we get a palindrome (431351153134).

It can be divided in two parts, 2211310 and 22012, that added together give a palindrome (2233322).

The spelling of 221131022012 in words is "two hundred twenty-one billion, one hundred thirty-one million, twenty-two thousand, twelve".