2121011211 has 32 divisors (see below), whose sum is σ = 3279732480. Its totient is φ = 1205712000.

The previous prime is 2121011201. The next prime is 2121011281. The reversal of 2121011211 is 1121101212.

It is not a de Polignac number, because 2121011211 - 2⁹ = 2121010699 is a prime.

2121011211 is a modest number, since divided by 11211 gives 2121 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2121011201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46581 + ... + 80073.

It is an arithmetic number, because the mean of its divisors is an integer number (102491640).

Almost surely, 2^2121011211 is an apocalyptic number.

2121011211 is a deficient number, since it is larger than the sum of its proper divisors (1158721269).

2121011211 is a wasteful number, since it uses less digits than its factorization.

2121011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33627.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2121011211 is about 46054.4374734943. The cubic root of 2121011211 is about 1284.8358758221.

Adding to 2121011211 its reverse (1121101212), we get a palindrome (3242112423).

Subtracting from 2121011211 its reverse (1121101212), we obtain a palindrome (999909999).

It can be divided in two parts, 212101 and 1211, that added together give a palindrome (213312).

The spelling of 2121011211 in words is "two billion, one hundred twenty-one million, eleven thousand, two hundred eleven".