221211101012 has 48 divisors (see below), whose sum is σ = 429334395840. Its totient is φ = 98879289600.

The previous prime is 221211100993. The next prime is 221211101077. The reversal of 221211101012 is 210101112122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17866568 + ... + 17878944.

It is an arithmetic number, because the mean of its divisors is an integer number (8944466580).

Almost surely, 2^221211101012 is an apocalyptic number.

221211101012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221211101012 is a deficient number, since it is larger than the sum of its proper divisors (208123294828).

221211101012 is a wasteful number, since it uses less digits than its factorization.

221211101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19112 (or 19110 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211101012 its reverse (210101112122), we get a palindrome (431312213134).

It can be divided in two parts, 22121110 and 1012, that added together give a palindrome (22122122).

The spelling of 221211101012 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, twelve".