2312021421 has 16 divisors (see below), whose sum is σ = 3437331520. Its totient is φ = 1535896080.

The previous prime is 2312021399. The next prime is 2312021473. The reversal of 2312021421 is 1241202132.

It is a happy number.

It is not a de Polignac number, because 2312021421 - 2⁷ = 2312021293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312021394 and 2312021403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143650 + ... + 158931.

It is an arithmetic number, because the mean of its divisors is an integer number (214833220).

Almost surely, 2^2312021421 is an apocalyptic number.

It is an amenable number.

2312021421 is a deficient number, since it is larger than the sum of its proper divisors (1125310099).

2312021421 is a wasteful number, since it uses less digits than its factorization.

2312021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302873 (or 302867 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2312021421 is about 48083.4838692040. The cubic root of 2312021421 is about 1322.3018874364.

Adding to 2312021421 its reverse (1241202132), we get a palindrome (3553223553).

The spelling of 2312021421 in words is "two billion, three hundred twelve million, twenty-one thousand, four hundred twenty-one".