2121023125430 has 32 divisors (see below), whose sum is σ = 4164997916160. Its totient is φ = 771266362720.

The previous prime is 2121023125423. The next prime is 2121023125439. The reversal of 2121023125430 is 345213201212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121023125430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121023125439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6768761 + ... + 7075179.

It is an arithmetic number, because the mean of its divisors is an integer number (130156184880).

Almost surely, 2^{2121023125430} is an apocalyptic number.

2121023125430 is a deficient number, since it is larger than the sum of its proper divisors (2043974790730).

2121023125430 is a wasteful number, since it uses less digits than its factorization.

2121023125430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369364.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 2121023125430 its reverse (345213201212), we get a palindrome (2466236326642).

The spelling of 2121023125430 in words is "two trillion, one hundred twenty-one billion, twenty-three million, one hundred twenty-five thousand, four hundred thirty".