211101945 has 16 divisors (see below), whose sum is σ = 338081472. Its totient is φ = 112481600.

The previous prime is 211101923. The next prime is 211101953. The reversal of 211101945 is 549101112.

It is a happy number.

211101945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211101945 - 2⁶ = 211101881 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 11395 + ... + 23495.

It is an arithmetic number, because the mean of its divisors is an integer number (21130092).

Almost surely, 2^211101945 is an apocalyptic number.

It is an amenable number.

211101945 is a deficient number, since it is larger than the sum of its proper divisors (126979527).

211101945 is a wasteful number, since it uses less digits than its factorization.

211101945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13272.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 211101945 is about 14529.3477141956. The cubic root of 211101945 is about 595.4300447758.

The spelling of 211101945 in words is "two hundred eleven million, one hundred one thousand, nine hundred forty-five".