221011001210 has 32 divisors (see below), whose sum is σ = 425563482960. Its totient is φ = 82346360832.

The previous prime is 221011001209. The next prime is 221011001273. The reversal of 221011001210 is 12100110122.

It can be written as a sum of positive squares in 8 ways, for example, as 137595741721 + 83415259489 = 370939^2 + 288817^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221011001191 and 221011001200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6684875 + ... + 6717854.

Almost surely, 2^221011001210 is an apocalyptic number.

221011001210 is a deficient number, since it is larger than the sum of its proper divisors (204552481750).

221011001210 is a wasteful number, since it uses less digits than its factorization.

221011001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402850.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221011001210 its reverse (12100110122), we get a palindrome (233111111332).

The spelling of 221011001210 in words is "two hundred twenty-one billion, eleven million, one thousand, two hundred ten".