200121121120020 has 96 divisors (see below), whose sum is σ = 560617847758080. Its totient is φ = 53339095157760.

The previous prime is 200121121120003. The next prime is 200121121120043. The reversal of 200121121120020 is 20021121121002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 1021381584 + ... + 1021577496.

It is an arithmetic number, because the mean of its divisors is an integer number (5839769247480).

Almost surely, 2^{200121121120020} is an apocalyptic number.

200121121120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121121120020 is an abundant number, since it is smaller than the sum of its proper divisors (360496726638060).

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

200121121120020 is a wasteful number, since it uses less digits than its factorization.

200121121120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204305 (or 204303 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 200121121120020 its reverse (20021121121002), we get a palindrome (220142242241022).

The spelling of 200121121120020 in words is "two hundred trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, twenty".