221650049012 has 36 divisors (see below), whose sum is σ = 453152814660. Its totient is φ = 94585163904.

The previous prime is 221650049003. The next prime is 221650049081. The reversal of 221650049012 is 210940056122.

It can be written as a sum of positive squares in 2 ways, for example, as 49295544676 + 172354504336 = 222026^2 + 415156^2 .

It is a super-2 number, since 2×221650049012² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221650049012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2381087 + ... + 2472422.

It is an arithmetic number, because the mean of its divisors is an integer number (12587578185).

Almost surely, 2^221650049012 is an apocalyptic number.

It is an amenable number.

221650049012 is an abundant number, since it is smaller than the sum of its proper divisors (231502765648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221650049012 is a wasteful number, since it uses less digits than its factorization.

221650049012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853760 (or 4853751 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 221650049012 in words is "two hundred twenty-one billion, six hundred fifty million, forty-nine thousand, twelve".