121311313033220 has 24 divisors (see below), whose sum is σ = 259560432039384. Its totient is φ = 47608968133376.

The previous prime is 121311313033189. The next prime is 121311313033231. The reversal of 121311313033220 is 22330313113121.

It can be written as a sum of positive squares in 4 ways, for example, as 15320664162244 + 105990648870976 = 3914162^2 + 10295176^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121311313033220.

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, 57222316409 + ... + 57222318528.

It is an arithmetic number, because the mean of its divisors is an integer number (10815018001641).

Almost surely, 2^{121311313033220} is an apocalyptic number.

121311313033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311313033220 is an abundant number, since it is smaller than the sum of its proper divisors (138249119006164).

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

121311313033220 is a wasteful number, since it uses less digits than its factorization.

121311313033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114444634999 (or 114444634997 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 121311313033220 its reverse (22330313113121), we get a palindrome (143641626146341).

The spelling of 121311313033220 in words is "one hundred twenty-one trillion, three hundred eleven billion, three hundred thirteen million, thirty-three thousand, two hundred twenty".