121235221430 has 32 divisors (see below), whose sum is σ = 221434274880. Its totient is φ = 47781408640.

The previous prime is 121235221369. The next prime is 121235221447. The reversal of 121235221430 is 34122532121.

It is a super-4 number, since 4×121235221430⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121235221430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110116 + ... + 1214424.

It is an arithmetic number, because the mean of its divisors is an integer number (6919821090).

Almost surely, 2^121235221430 is an apocalyptic number.

121235221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121235221430 is a deficient number, since it is larger than the sum of its proper divisors (100199053450).

121235221430 is a wasteful number, since it uses less digits than its factorization.

121235221430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106024.

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

Adding to 121235221430 its reverse (34122532121), we get a palindrome (155357753551).

The spelling of 121235221430 in words is "one hundred twenty-one billion, two hundred thirty-five million, two hundred twenty-one thousand, four hundred thirty".