2121446757 has 4 divisors (see below), whose sum is σ = 2828595680. Its totient is φ = 1414297836.

The previous prime is 2121446731. The next prime is 2121446771. The reversal of 2121446757 is 7576441212.

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 not a de Polignac number, because 2121446757 - 2⁷ = 2121446629 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 (2121446707) 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, 353574457 + ... + 353574462.

It is an arithmetic number, because the mean of its divisors is an integer number (707148920).

Almost surely, 2^2121446757 is an apocalyptic number.

It is an amenable number.

2121446757 is a deficient number, since it is larger than the sum of its proper divisors (707148923).

2121446757 is an equidigital number, since it uses as much as digits as its factorization.

2121446757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707148922.

The product of its digits is 94080, while the sum is 39.

The square root of 2121446757 is about 46059.1658304837. The cubic root of 2121446757 is about 1284.9238160812.

Adding to 2121446757 its reverse (7576441212), we get a palindrome (9697887969).

It can be divided in two parts, 2121 and 446757, that added together give a triangular number (448878 = T₉₄₇).

The spelling of 2121446757 in words is "two billion, one hundred twenty-one million, four hundred forty-six thousand, seven hundred fifty-seven".