2121022011 has 4 divisors (see below), whose sum is σ = 2828029352. Its totient is φ = 1414014672.

The previous prime is 2121021967. The next prime is 2121022021. The reversal of 2121022011 is 1102201212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2121022011 - 2⁷ = 2121021883 is a prime.

It is a super-2 number, since 2×2121022011² = 8997468742292968242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121022021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353503666 + ... + 353503671.

It is an arithmetic number, because the mean of its divisors is an integer number (707007338).

Almost surely, 2^2121022011 is an apocalyptic number.

2121022011 is a deficient number, since it is larger than the sum of its proper divisors (707007341).

2121022011 is an equidigital number, since it uses as much as digits as its factorization.

2121022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707007340.

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

The square root of 2121022011 is about 46054.5547258900. The cubic root of 2121022011 is about 1284.8380565750.

Adding to 2121022011 its reverse (1102201212), we get a palindrome (3223223223).

The spelling of 2121022011 in words is "two billion, one hundred twenty-one million, twenty-two thousand, eleven".