221061051812 has 12 divisors (see below), whose sum is σ = 390612733056. Its totient is φ = 109457413800.

The previous prime is 221061051787. The next prime is 221061051821. The reversal of 221061051812 is 218150160122.

It is a super-3 number, since 3×221061051812³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268277564 + ... + 268278387.

It is an arithmetic number, because the mean of its divisors is an integer number (32551061088).

Almost surely, 2^221061051812 is an apocalyptic number.

It is an amenable number.

221061051812 is a deficient number, since it is larger than the sum of its proper divisors (169551681244).

221061051812 is a wasteful number, since it uses less digits than its factorization.

221061051812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536556058 (or 536556056 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The spelling of 221061051812 in words is "two hundred twenty-one billion, sixty-one million, fifty-one thousand, eight hundred twelve".