2120021211 has 48 divisors (see below), whose sum is σ = 3702924288. Its totient is φ = 1065758400.

The previous prime is 2120021179. The next prime is 2120021237. The reversal of 2120021211 is 1121200212.

It is not a de Polignac number, because 2120021211 - 2⁵ = 2120021179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120022211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28981 + ... + 71273.

It is an arithmetic number, because the mean of its divisors is an integer number (77144256).

Almost surely, 2^2120021211 is an apocalyptic number.

2120021211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2120021211 is a deficient number, since it is larger than the sum of its proper divisors (1582903077).

2120021211 is a wasteful number, since it uses less digits than its factorization.

2120021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42352 (or 42345 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2120021211 is about 46043.6880690502. The cubic root of 2120021211 is about 1284.6359420256.

Adding to 2120021211 its reverse (1121200212), we get a palindrome (3241221423).

It can be divided in two parts, 21200212 and 11, that multiplied together give a palindrome (233202332).

The spelling of 2120021211 in words is "two billion, one hundred twenty million, twenty-one thousand, two hundred eleven".