210021221121222 has 64 divisors (see below), whose sum is σ = 481524063842304. Its totient is φ = 59821637404320.

The previous prime is 210021221121193. The next prime is 210021221121281. The reversal of 210021221121222 is 222121122120012.

210021221121222 is digitally balanced in base 2, because in such base 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 (21).

It is a congruent 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, 271300273 + ... + 272073299.

It is an arithmetic number, because the mean of its divisors is an integer number (7523813497536).

Almost surely, 2^{210021221121222} is an apocalyptic number.

210021221121222 is an abundant number, since it is smaller than the sum of its proper divisors (271502842721082).

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

210021221121222 is a wasteful number, since it uses less digits than its factorization.

210021221121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792913.

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

Adding to 210021221121222 its reverse (222121122120012), we get a palindrome (432142343241234).

The spelling of 210021221121222 in words is "two hundred ten trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".