121233213000 has 128 divisors (see below), whose sum is σ = 420275232000. Its totient is φ = 32328849600.

The previous prime is 121233212993. The next prime is 121233213029. The reversal of 121233213000 is 312332121.

121233213000 is a `hidden beast` number, since 1 + 21 + 23 + 321 + 300 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2218060 + ... + 2272059.

It is an arithmetic number, because the mean of its divisors is an integer number (3283400250).

Almost surely, 2^121233213000 is an apocalyptic number.

121233213000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121233213000 is an abundant number, since it is smaller than the sum of its proper divisors (299042019000).

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

121233213000 is a wasteful number, since it uses less digits than its factorization.

121233213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490149 (or 4490129 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121233213000 its reverse (312332121), we get a palindrome (121545545121).

The spelling of 121233213000 in words is "one hundred twenty-one billion, two hundred thirty-three million, two hundred thirteen thousand".