2121233426 has 16 divisors (see below), whose sum is σ = 3447636864. Its totient is φ = 973022544.

The previous prime is 2121233423. The next prime is 2121233447. The reversal of 2121233426 is 6243321212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121233395 and 2121233404.

It is not an unprimeable number, because it can be changed into a prime (2121233423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246026 + ... + 254501.

It is an arithmetic number, because the mean of its divisors is an integer number (215477304).

Almost surely, 2^2121233426 is an apocalyptic number.

2121233426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2121233426 is a deficient number, since it is larger than the sum of its proper divisors (1326403438).

2121233426 is a wasteful number, since it uses less digits than its factorization.

2121233426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500705.

The product of its digits is 3456, while the sum is 26.

The square root of 2121233426 is about 46056.8499357045. The cubic root of 2121233426 is about 1284.8807443315.

Adding to 2121233426 its reverse (6243321212), we get a palindrome (8364554638).

The spelling of 2121233426 in words is "two billion, one hundred twenty-one million, two hundred thirty-three thousand, four hundred twenty-six".