1234212421 has 8 divisors (see below), whose sum is σ = 1374985080. Its totient is φ = 1099987392.

The previous prime is 1234212403. The next prime is 1234212437. The reversal of 1234212421 is 1242124321.

It can be written as a sum of positive squares in 4 ways, for example, as 296321796 + 937890625 = 17214^2 + 30625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1234212421 - 2⁵ = 1234212389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234212392 and 1234212401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234212401) 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, 1636510 + ... + 1637263.

It is an arithmetic number, because the mean of its divisors is an integer number (171873135).

Almost surely, 2^1234212421 is an apocalyptic number.

It is an amenable number.

1234212421 is a deficient number, since it is larger than the sum of its proper divisors (140772659).

1234212421 is a wasteful number, since it uses less digits than its factorization.

1234212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273815.

The product of its digits is 768, while the sum is 22.

The square root of 1234212421 is about 35131.3595097030. The cubic root of 1234212421 is about 1072.6630092933.

Adding to 1234212421 its reverse (1242124321), we get a palindrome (2476336742).

The spelling of 1234212421 in words is "one billion, two hundred thirty-four million, two hundred twelve thousand, four hundred twenty-one".