121243314340 has 24 divisors (see below), whose sum is σ = 256442699520. Its totient is φ = 48148423008.

The previous prime is 121243314329. The next prime is 121243314341. The reversal of 121243314340 is 43413342121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121243314299 and 121243314308.

It is not an unprimeable number, because it can be changed into a prime (121243314341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21803572 + ... + 21809131.

It is an arithmetic number, because the mean of its divisors is an integer number (10685112480).

Almost surely, 2^121243314340 is an apocalyptic number.

121243314340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121243314340 is an abundant number, since it is smaller than the sum of its proper divisors (135199385180).

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

121243314340 is a wasteful number, since it uses less digits than its factorization.

121243314340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43612851 (or 43612849 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 121243314340 its reverse (43413342121), we get a palindrome (164656656461).

The spelling of 121243314340 in words is "one hundred twenty-one billion, two hundred forty-three million, three hundred fourteen thousand, three hundred forty".