121313221010 has 32 divisors (see below), whose sum is σ = 235208143872. Its totient is φ = 44918216640.

The previous prime is 121313220961. The next prime is 121313221013. The reversal of 121313221010 is 10122313121.

It is a super-3 number, since 3×121313221010³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121313221010.

It is not an unprimeable number, because it can be changed into a prime (121313221013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8500109 + ... + 8514368.

It is an arithmetic number, because the mean of its divisors is an integer number (7350254496).

Almost surely, 2^121313221010 is an apocalyptic number.

121313221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121313221010 is a deficient number, since it is larger than the sum of its proper divisors (113894922862).

121313221010 is a wasteful number, since it uses less digits than its factorization.

121313221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17014538.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121313221010 its reverse (10122313121), we get a palindrome (131435534131).

The spelling of 121313221010 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred twenty-one thousand, ten".