221401010 has 16 divisors (see below), whose sum is σ = 400726872. Its totient is φ = 88070400.

The previous prime is 221401009. The next prime is 221401049. The reversal of 221401010 is 10104122.

It can be written as a sum of positive squares in 4 ways, for example, as 88529281 + 132871729 = 9409^2 + 11527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221400982 and 221401000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59351 + ... + 62970.

Almost surely, 2^221401010 is an apocalyptic number.

221401010 is a deficient number, since it is larger than the sum of its proper divisors (179325862).

221401010 is a wasteful number, since it uses less digits than its factorization.

221401010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122509.

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

The square root of 221401010 is about 14879.5500604017. The cubic root of 221401010 is about 604.9598224805.

Adding to 221401010 its reverse (10104122), we get a palindrome (231505132).

The spelling of 221401010 in words is "two hundred twenty-one million, four hundred one thousand, ten".