211121021222202 has 384 divisors, whose sum is σ = 578678946177024. Its totient is φ = 49802698616832.

The previous prime is 211121021222191. The next prime is 211121021222357. The reversal of 211121021222202 is 202222120121112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 546210303 + ... + 546596685.

It is an arithmetic number, because the mean of its divisors is an integer number (1506976422336).

Almost surely, 2^{211121021222202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211121021222202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289339473088512).

211121021222202 is an abundant number, since it is smaller than the sum of its proper divisors (367557924954822).

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

211121021222202 is a wasteful number, since it uses less digits than its factorization.

211121021222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386542 (or 386505 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211121021222202 its reverse (202222120121112), we get a palindrome (413343141343314).

The spelling of 211121021222202 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred two".