210221202121000 has 128 divisors (see below), whose sum is σ = 562204065346560. Its totient is φ = 72074237184000.

The previous prime is 210221202120977. The next prime is 210221202121067. The reversal of 210221202121000 is 121202122012.

It is a happy 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, 338931160 + ... + 339550840.

It is an arithmetic number, because the mean of its divisors is an integer number (4392219260520).

Almost surely, 2^{210221202121000} is an apocalyptic number.

210221202121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221202121000 is an abundant number, since it is smaller than the sum of its proper divisors (351982863225560).

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

210221202121000 is a wasteful number, since it uses less digits than its factorization.

210221202121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668172 (or 668158 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210221202121000 its reverse (121202122012), we get a palindrome (210342404243012).

The spelling of 210221202121000 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand".