211220104 has 16 divisors (see below), whose sum is σ = 419334300. Its totient is φ = 99397632.

The previous prime is 211220099. The next prime is 211220117. The reversal of 211220104 is 401022112.

It is a happy number.

211220104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 207417604 + 3802500 = 14402^2 + 1950^2 .

It is a super-2 number, since 2×211220104² = 89227864667541632, which contains 22 as substring.

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, 776409 + ... + 776680.

Almost surely, 2^211220104 is an apocalyptic number.

It is an amenable number.

211220104 is a deficient number, since it is larger than the sum of its proper divisors (208114196).

211220104 is a wasteful number, since it uses less digits than its factorization.

211220104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553112 (or 1553108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 211220104 is about 14533.4133636940. The cubic root of 211220104 is about 595.5411163818.

Adding to 211220104 its reverse (401022112), we get a palindrome (612242216).

The spelling of 211220104 in words is "two hundred eleven million, two hundred twenty thousand, one hundred four".