221121010210120 has 32 divisors (see below), whose sum is σ = 497523551484600. Its totient is φ = 88448176793088.

The previous prime is 221121010210081. The next prime is 221121010210127. The reversal of 221121010210120 is 21012010121122.

It can be written as a sum of positive squares in 4 ways, for example, as 125738949102244 + 95382061107876 = 11213338^2 + 9766374^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221121010210094 and 221121010210103.

It is not an unprimeable number, because it can be changed into a prime (221121010210127) 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, 9114532 + ... + 22919788.

Almost surely, 2^{221121010210120} is an apocalyptic number.

221121010210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121010210120 is an abundant number, since it is smaller than the sum of its proper divisors (276402541274480).

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

221121010210120 is a wasteful number, since it uses less digits than its factorization.

221121010210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14205697 (or 14205693 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121010210120 its reverse (21012010121122), we get a palindrome (242133020331242).

The spelling of 221121010210120 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, ten million, two hundred ten thousand, one hundred twenty".