121320440430 has 64 divisors (see below), whose sum is σ = 336195256320. Its totient is φ = 27444501504.

The previous prime is 121320440429. The next prime is 121320440443. The reversal of 121320440430 is 34044023121.

It is a super-2 number, since 2×121320440430² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121320440430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2957550 + ... + 2998289.

It is an arithmetic number, because the mean of its divisors is an integer number (5253050880).

Almost surely, 2^121320440430 is an apocalyptic number.

121320440430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121320440430 is an abundant number, since it is smaller than the sum of its proper divisors (214874815890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121320440430 is a wasteful number, since it uses less digits than its factorization.

121320440430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955953.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 121320440430 its reverse (34044023121), we get a palindrome (155364463551).

The spelling of 121320440430 in words is "one hundred twenty-one billion, three hundred twenty million, four hundred forty thousand, four hundred thirty".