121221231121310 has 32 divisors (see below), whose sum is σ = 223307632326240. Its totient is φ = 47353420533888.

The previous prime is 121221231121307. The next prime is 121221231121339. The reversal of 121221231121310 is 13121132122121.

It is a super-2 number, since 2×121221231121310² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19377125 + ... + 24857904.

It is an arithmetic number, because the mean of its divisors is an integer number (6978363510195).

Almost surely, 2^{121221231121310} is an apocalyptic number.

121221231121310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221231121310 is a deficient number, since it is larger than the sum of its proper divisors (102086401204930).

121221231121310 is a wasteful number, since it uses less digits than its factorization.

121221231121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44241452.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121221231121310 its reverse (13121132122121), we get a palindrome (134342363243431).

The spelling of 121221231121310 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred ten".