211020104 has 8 divisors (see below), whose sum is σ = 395662710. Its totient is φ = 105510048.

The previous prime is 211020091. The next prime is 211020107. The reversal of 211020104 is 401020112.

It can be written as a sum of positive squares in only one way, i.e., 210192004 + 828100 = 14498^2 + 910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (211020107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13188749 + ... + 13188764.

Almost surely, 2^211020104 is an apocalyptic number.

It is an amenable number.

211020104 is a deficient number, since it is larger than the sum of its proper divisors (184642606).

211020104 is a wasteful number, since it uses less digits than its factorization.

211020104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26377519 (or 26377515 counting only the distinct ones).

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

The square root of 211020104 is about 14526.5310380696. The cubic root of 211020104 is about 595.3530884518.

Adding to 211020104 its reverse (401020112), we get a palindrome (612040216).

The spelling of 211020104 in words is "two hundred eleven million, twenty thousand, one hundred four".