221001100022210 has 16 divisors (see below), whose sum is σ = 398463880183992. Its totient is φ = 88253351088000.

The previous prime is 221001100022207. The next prime is 221001100022249. The reversal of 221001100022210 is 12220001100122.

It can be written as a sum of positive squares in 4 ways, for example, as 209420752276129 + 11580347746081 = 14471377^2 + 3402991^2 .

It is a super-2 number, since 2×221001100022210² (a number of 29 digits) contains 22 as substring.

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, 18386108801 + ... + 18386120820.

Almost surely, 2^{221001100022210} is an apocalyptic number.

221001100022210 is a deficient number, since it is larger than the sum of its proper divisors (177462780161782).

221001100022210 is a wasteful number, since it uses less digits than its factorization.

221001100022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36772230229.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221001100022210 its reverse (12220001100122), we get a palindrome (233221101122332).

The spelling of 221001100022210 in words is "two hundred twenty-one trillion, one billion, one hundred million, twenty-two thousand, two hundred ten".