211121222221000 has 128 divisors (see below), whose sum is σ = 608029120258560. Its totient is φ = 66816386784000.

The previous prime is 211121222220989. The next prime is 211121222221027. The reversal of 211121222221000 is 122222121112.

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, 1159915716 + ... + 1160097715.

It is an arithmetic number, because the mean of its divisors is an integer number (4750227502020).

Almost surely, 2^{211121222221000} is an apocalyptic number.

211121222221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121222221000 is an abundant number, since it is smaller than the sum of its proper divisors (396907898037560).

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

211121222221000 is a wasteful number, since it uses less digits than its factorization.

211121222221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320013472 (or 2320013458 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211121222221000 its reverse (122222121112), we get a palindrome (211243444342112).

The spelling of 211121222221000 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand".