210221022121002 has 96 divisors (see below), whose sum is σ = 508408805848320. Its totient is φ = 62387711447040.

The previous prime is 210221022120961. The next prime is 210221022121009. The reversal of 210221022121002 is 200121220122012.

It is a happy number.

210221022121002 is a `hidden beast` number, since 2 + 10 + 221 + 0 + 221 + 210 + 0 + 2 = 666.

210221022121002 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (210221022121009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22950274 + ... + 30775917.

It is an arithmetic number, because the mean of its divisors is an integer number (5295925060920).

Almost surely, 2^{210221022121002} is an apocalyptic number.

210221022121002 is an abundant number, since it is smaller than the sum of its proper divisors (298187783727318).

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

210221022121002 is a wasteful number, since it uses less digits than its factorization.

210221022121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53726908 (or 53726905 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210221022121002 its reverse (200121220122012), we get a palindrome (410342242243014).

The spelling of 210221022121002 in words is "two hundred ten trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, two".