221122021011210 has 192 divisors, whose sum is σ = 634807440783360. Its totient is φ = 52956421856640.

The previous prime is 221122021011209. The next prime is 221122021011263. The reversal of 221122021011210 is 12110120221122.

221122021011210 is a `hidden beast` number, since 2 + 2 + 11 + 220 + 210 + 11 + 210 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35121579 + ... + 40936161.

It is an arithmetic number, because the mean of its divisors is an integer number (3306288754080).

Almost surely, 2^{221122021011210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122021011210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317403720391680).

221122021011210 is an abundant number, since it is smaller than the sum of its proper divisors (413685419772150).

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

221122021011210 is a wasteful number, since it uses less digits than its factorization.

221122021011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815073 (or 5815070 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221122021011210 its reverse (12110120221122), we get a palindrome (233232141232332).

The spelling of 221122021011210 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, twenty-one million, eleven thousand, two hundred ten".