211201011 has 12 divisors (see below), whose sum is σ = 348649392. Its totient is φ = 120686256.

The previous prime is 211201007. The next prime is 211201031. The reversal of 211201011 is 110102112.

It is a happy number.

It is not a de Polignac number, because 211201011 - 2² = 211201007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 211200984 and 211201002.

It is not an unprimeable number, because it can be changed into a prime (211201031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1676136 + ... + 1676261.

It is an arithmetic number, because the mean of its divisors is an integer number (29054116).

Almost surely, 2^211201011 is an apocalyptic number.

211201011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211201011 is a deficient number, since it is larger than the sum of its proper divisors (137448381).

211201011 is a wasteful number, since it uses less digits than its factorization.

211201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352410 (or 3352407 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 211201011 is about 14532.7564832003. The cubic root of 211201011 is about 595.5231714214.

Adding to 211201011 its reverse (110102112), we get a palindrome (321303123).

The spelling of 211201011 in words is "two hundred eleven million, two hundred one thousand, eleven".