2121240430 has 8 divisors (see below), whose sum is σ = 3818232792. Its totient is φ = 848496168.

The previous prime is 2121240397. The next prime is 2121240431. The reversal of 2121240430 is 340421212.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121240398 and 2121240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121240431) 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, 106062012 + ... + 106062031.

It is an arithmetic number, because the mean of its divisors is an integer number (477279099).

Almost surely, 2^2121240430 is an apocalyptic number.

2121240430 is a deficient number, since it is larger than the sum of its proper divisors (1696992362).

2121240430 is a wasteful number, since it uses less digits than its factorization.

2121240430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212124050.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2121240430 is about 46056.9259721054. The cubic root of 2121240430 is about 1284.8821584922.

Adding to 2121240430 its reverse (340421212), we get a palindrome (2461661642).

The spelling of 2121240430 in words is "two billion, one hundred twenty-one million, two hundred forty thousand, four hundred thirty".