201122221121020 has 12 divisors (see below), whose sum is σ = 422356664354184. Its totient is φ = 80448888448400.

The previous prime is 201122221120999. The next prime is 201122221121021. The reversal of 201122221121020 is 20121122221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122221121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5028055528006 + ... + 5028055528045.

It is an arithmetic number, because the mean of its divisors is an integer number (35196388696182).

Almost surely, 2^{201122221121020} is an apocalyptic number.

201122221121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201122221121020 is an abundant number, since it is smaller than the sum of its proper divisors (221234443233164).

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

201122221121020 is a wasteful number, since it uses less digits than its factorization.

201122221121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10056111056060 (or 10056111056058 counting only the distinct ones).

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

Adding to 201122221121020 its reverse (20121122221102), we get a palindrome (221243343342122).

The spelling of 201122221121020 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty".