2121020441 has 4 divisors (see below), whose sum is σ = 2156970000. Its totient is φ = 2085070884.

The previous prime is 2121020431. The next prime is 2121020479. The reversal of 2121020441 is 1440201212.

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 2121020441 - 2¹⁴ = 2121004057 is a prime.

It is a super-2 number, since 2×2121020441² = 8997455422279668962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121020411) 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, 17974691 + ... + 17974808.

It is an arithmetic number, because the mean of its divisors is an integer number (539242500).

Almost surely, 2^2121020441 is an apocalyptic number.

It is an amenable number.

2121020441 is a deficient number, since it is larger than the sum of its proper divisors (35949559).

2121020441 is an equidigital number, since it uses as much as digits as its factorization.

2121020441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35949558.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121020441 is about 46054.5376808844. The cubic root of 2121020441 is about 1284.8377395586.

Adding to 2121020441 its reverse (1440201212), we get a palindrome (3561221653).

The spelling of 2121020441 in words is "two billion, one hundred twenty-one million, twenty thousand, four hundred forty-one".