121321310 has 16 divisors (see below), whose sum is σ = 238231152. Its totient is φ = 44116800.

The previous prime is 121321307. The next prime is 121321339. The reversal of 121321310 is 13123121.

It is a super-2 number, since 2×121321310² = 29437720520232200, which 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 7 ways as a sum of consecutive naturals, for example, 551351 + ... + 551570.

It is an arithmetic number, because the mean of its divisors is an integer number (14889447).

Almost surely, 2^121321310 is an apocalyptic number.

121321310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321310 is a deficient number, since it is larger than the sum of its proper divisors (116909842).

121321310 is a wasteful number, since it uses less digits than its factorization.

121321310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102939.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121321310 is about 11014.5953171235. The cubic root of 121321310 is about 495.0461610524.

Adding to 121321310 its reverse (13123121), we get a palindrome (134444431).

The spelling of 121321310 in words is "one hundred twenty-one million, three hundred twenty-one thousand, three hundred ten".