121321213310 has 32 divisors (see below), whose sum is σ = 238852841472. Its totient is φ = 44001602080.

The previous prime is 121321213291. The next prime is 121321213313. The reversal of 121321213310 is 13312123121.

It is a happy number.

121321213310 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121321213310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321213313) 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, 1397714 + ... + 1481973.

It is an arithmetic number, because the mean of its divisors is an integer number (7464151296).

Almost surely, 2^121321213310 is an apocalyptic number.

121321213310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321213310 is a deficient number, since it is larger than the sum of its proper divisors (117531628162).

121321213310 is a wasteful number, since it uses less digits than its factorization.

121321213310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880088.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121321213310 its reverse (13312123121), we get a palindrome (134633336431).

The spelling of 121321213310 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred ten".