200120021010 has 128 divisors (see below), whose sum is σ = 656804252160. Its totient is φ = 42223120128.

The previous prime is 200120020987. The next prime is 200120021027. The reversal of 200120021010 is 10120021002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200120020983 and 200120021001.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4047877 + ... + 4097016.

It is an arithmetic number, because the mean of its divisors is an integer number (5131283220).

Almost surely, 2^200120021010 is an apocalyptic number.

200120021010 is an abundant number, since it is smaller than the sum of its proper divisors (456684231150).

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

200120021010 is a wasteful number, since it uses less digits than its factorization.

200120021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8144929 (or 8144923 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 200120021010 its reverse (10120021002), we get a palindrome (210240042012).

The spelling of 200120021010 in words is "two hundred billion, one hundred twenty million, twenty-one thousand, ten".