320121213121100 has 36 divisors (see below), whose sum is σ = 694666789459104. Its totient is φ = 128047792716480.

The previous prime is 320121213121079. The next prime is 320121213121111. The reversal of 320121213121100 is 1121312121023.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 10128509 + ... + 27254891.

Almost surely, 2^{320121213121100} is an apocalyptic number.

It is an amenable number.

320121213121100 is an abundant number, since it is smaller than the sum of its proper divisors (374545576338004).

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

320121213121100 is a wasteful number, since it uses less digits than its factorization.

320121213121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17313314 (or 17313307 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 320121213121100 its reverse (1121312121023), we get a palindrome (321242525242123).

The spelling of 320121213121100 in words is "three hundred twenty trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-one thousand, one hundred".