211020111010 has 8 divisors (see below), whose sum is σ = 379836199836. Its totient is φ = 84408044400.

The previous prime is 211020111007. The next prime is 211020111017. The reversal of 211020111010 is 10111020112.

It can be written as a sum of positive squares in 2 ways, for example, as 209788732729 + 1231378281 = 458027^2 + 35091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 21102011101 = 211020111010 / (2 + 1 + 1 + 0 + 2 + 0 + 1 + 1 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (211020111017) 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 3 ways as a sum of consecutive naturals, for example, 10551005541 + ... + 10551005560.

Almost surely, 2^211020111010 is an apocalyptic number.

211020111010 is a deficient number, since it is larger than the sum of its proper divisors (168816088826).

211020111010 is a wasteful number, since it uses less digits than its factorization.

211020111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21102011108.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 211020111010 its reverse (10111020112), we get a palindrome (221131131122).

The spelling of 211020111010 in words is "two hundred eleven billion, twenty million, one hundred eleven thousand, ten".