2121021941 has 4 divisors (see below), whose sum is σ = 2147870400. Its totient is φ = 2094173484.

The previous prime is 2121021937. The next prime is 2121021967. The reversal of 2121021941 is 1491201212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121021941 - 2² = 2121021937 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121021241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13424111 + ... + 13424268.

It is an arithmetic number, because the mean of its divisors is an integer number (536967600).

Almost surely, 2^2121021941 is an apocalyptic number.

It is an amenable number.

2121021941 is a deficient number, since it is larger than the sum of its proper divisors (26848459).

2121021941 is an equidigital number, since it uses as much as digits as its factorization.

2121021941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26848458.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2121021941 is about 46054.5539659218. The cubic root of 2121021941 is about 1284.8380424405.

The spelling of 2121021941 in words is "two billion, one hundred twenty-one million, twenty-one thousand, nine hundred forty-one".