210021201202122 has 64 divisors (see below), whose sum is σ = 470411457331200. Its totient is φ = 69452468895600.

The previous prime is 210021201202097. The next prime is 210021201202139. The reversal of 210021201202122 is 221202102120012.

It is a happy number.

210021201202122 is a `hidden beast` number, since 210 + 0 + 2 + 120 + 120 + 212 + 2 = 666.

It is a super-2 number, since 2×210021201202122² (a number of 29 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 210021201202095 and 210021201202104.

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, 143006247 + ... + 144467397.

It is an arithmetic number, because the mean of its divisors is an integer number (7350179020800).

Almost surely, 2^{210021201202122} is an apocalyptic number.

210021201202122 is an abundant number, since it is smaller than the sum of its proper divisors (260390256129078).

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

210021201202122 is a wasteful number, since it uses less digits than its factorization.

210021201202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482248 (or 1482242 counting only the distinct ones).

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

Adding to 210021201202122 its reverse (221202102120012), we get a palindrome (431223303322134).

The spelling of 210021201202122 in words is "two hundred ten trillion, twenty-one billion, two hundred one million, two hundred two thousand, one hundred twenty-two".