121000081320 has 48 divisors (see below), whose sum is σ = 393250265460. Its totient is φ = 32266688256.

The previous prime is 121000081291. The next prime is 121000081337. The reversal of 121000081320 is 23180000121.

It can be written as a sum of positive squares in 2 ways, for example, as 116402427684 + 4597653636 = 341178^2 + 67806^2 .

It is a super-2 number, since 2×121000081320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121000081293 and 121000081302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168055309 + ... + 168056028.

Almost surely, 2^121000081320 is an apocalyptic number.

121000081320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000081320 is an abundant number, since it is smaller than the sum of its proper divisors (272250184140).

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

121000081320 is a wasteful number, since it uses less digits than its factorization.

121000081320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336111354 (or 336111347 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121000081320 its reverse (23180000121), we get a palindrome (144180081441).

The spelling of 121000081320 in words is "one hundred twenty-one billion, eighty-one thousand, three hundred twenty".