121313353434 has 128 divisors (see below), whose sum is σ = 307267333632. Its totient is φ = 31071237120.

The previous prime is 121313353379. The next prime is 121313353459. The reversal of 121313353434 is 434353313121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121313353395 and 121313353404.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11247124 + ... + 11257904.

It is an arithmetic number, because the mean of its divisors is an integer number (2400526044).

Almost surely, 2^121313353434 is an apocalyptic number.

121313353434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121313353434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153633666816).

121313353434 is an abundant number, since it is smaller than the sum of its proper divisors (185953980198).

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

121313353434 is a wasteful number, since it uses less digits than its factorization.

121313353434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11400.

The product of its digits is 38880, while the sum is 33.

Adding to 121313353434 its reverse (434353313121), we get a palindrome (555666666555).

The spelling of 121313353434 in words is "one hundred twenty-one billion, three hundred thirteen million, three hundred fifty-three thousand, four hundred thirty-four".