121313351016 has 192 divisors, whose sum is σ = 394211301120. Its totient is φ = 33211676160.

The previous prime is 121313351011. The next prime is 121313351017. The reversal of 121313351016 is 610153313121.

It is a happy number.

121313351016 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 133 + 510 + 16 = 666.

It is not an unprimeable number, because it can be changed into a prime (121313351011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358566 + ... + 609258.

It is an arithmetic number, because the mean of its divisors is an integer number (2053183860).

Almost surely, 2^121313351016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121313351016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197105650560).

121313351016 is an abundant number, since it is smaller than the sum of its proper divisors (272897950104).

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

121313351016 is a wasteful number, since it uses less digits than its factorization.

121313351016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250776 (or 250769 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 121313351016 its reverse (610153313121), we get a palindrome (731466664137).

The spelling of 121313351016 in words is "one hundred twenty-one billion, three hundred thirteen million, three hundred fifty-one thousand, sixteen".