10211122221220 has 24 divisors (see below), whose sum is σ = 21443796582264. Its totient is φ = 4084365094656.

The previous prime is 10211122221187. The next prime is 10211122221221. The reversal of 10211122221220 is 2212222111201.

It can be written as a sum of positive squares in 4 ways, for example, as 121757727844 + 10089364493376 = 348938^2 + 3176376^2 .

It is not an unprimeable number, because it can be changed into a prime (10211122221221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4233169 + ... + 6192088.

It is an arithmetic number, because the mean of its divisors is an integer number (893491524261).

Almost surely, 2^{10211122221220} is an apocalyptic number.

10211122221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211122221220 is an abundant number, since it is smaller than the sum of its proper divisors (11232674361044).

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

10211122221220 is a wasteful number, since it uses less digits than its factorization.

10211122221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474239 (or 10474237 counting only the distinct ones).

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

Adding to 10211122221220 its reverse (2212222111201), we get a palindrome (12423344332421).

The spelling of 10211122221220 in words is "ten trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".