2121121220230 has 8 divisors (see below), whose sum is σ = 3818018196432. Its totient is φ = 848448488088.

The previous prime is 2121121220219. The next prime is 2121121220233. The reversal of 2121121220230 is 320221211212.

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

It is a super-2 number, since 2×2121121220230² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121121220198 and 2121121220207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121220233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106056061002 + ... + 106056061021.

It is an arithmetic number, because the mean of its divisors is an integer number (477252274554).

Almost surely, 2^{2121121220230} is an apocalyptic number.

2121121220230 is a deficient number, since it is larger than the sum of its proper divisors (1696896976202).

2121121220230 is a wasteful number, since it uses less digits than its factorization.

2121121220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212112122030.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2121121220230 its reverse (320221211212), we get a palindrome (2441342431442).

The spelling of 2121121220230 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred thirty".