221121021203010 has 48 divisors (see below), whose sum is σ = 574966224214200. Its totient is φ = 58960316517120.

The previous prime is 221121021203003. The next prime is 221121021203023. The reversal of 221121021203010 is 10302120121122.

221121021203010 is a `hidden beast` number, since 2 + 211 + 210 + 212 + 0 + 30 + 1 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 118116445323321 + 103004575879689 = 10868139^2 + 10149117^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109181371 + ... + 111188190.

Almost surely, 2^{221121021203010} is an apocalyptic number.

221121021203010 is an abundant number, since it is smaller than the sum of its proper divisors (353845203011190).

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

221121021203010 is a wasteful number, since it uses less digits than its factorization.

221121021203010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220380723 (or 220380720 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221121021203010 its reverse (10302120121122), we get a palindrome (231423141324132).

The spelling of 221121021203010 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty-one million, two hundred three thousand, ten".