221220001010 has 8 divisors (see below), whose sum is σ = 398196001836. Its totient is φ = 88488000400.

The previous prime is 221220001003. The next prime is 221220001027. The reversal of 221220001010 is 10100022122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 216866244721 + 4353756289 = 465689^2 + 65983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221220000982 and 221220001000.

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, 11061000041 + ... + 11061000060.

Almost surely, 2^221220001010 is an apocalyptic number.

221220001010 is a deficient number, since it is larger than the sum of its proper divisors (176976000826).

221220001010 is a wasteful number, since it uses less digits than its factorization.

221220001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22122000108.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221220001010 its reverse (10100022122), we get a palindrome (231320023132).

The spelling of 221220001010 in words is "two hundred twenty-one billion, two hundred twenty million, one thousand, ten".