221012211012110 has 192 divisors, whose sum is σ = 483674984304768. Its totient is φ = 71214398201856.

The previous prime is 221012211012079. The next prime is 221012211012113. The reversal of 221012211012110 is 11210112210122.

It is a super-2 number, since 2×221012211012110² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012211012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 62134440452 + ... + 62134444008.

It is an arithmetic number, because the mean of its divisors is an integer number (2519140543254).

Almost surely, 2^{221012211012110} is an apocalyptic number.

221012211012110 is an abundant number, since it is smaller than the sum of its proper divisors (262662773292658).

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

221012211012110 is a wasteful number, since it uses less digits than its factorization.

221012211012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215 (or 7198 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221012211012110 its reverse (11210112210122), we get a palindrome (232222323222232).

The spelling of 221012211012110 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, twelve thousand, one hundred ten".