220121221002011 has 4 divisors (see below), whose sum is σ = 251567109716592. Its totient is φ = 188675332287432.

The previous prime is 220121221001993. The next prime is 220121221002031. The reversal of 220121221002011 is 110200122121022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220121221002011 - 2¹⁰ = 220121221000987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121221002031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15722944357280 + ... + 15722944357293.

It is an arithmetic number, because the mean of its divisors is an integer number (62891777429148).

Almost surely, 2^{220121221002011} is an apocalyptic number.

220121221002011 is a deficient number, since it is larger than the sum of its proper divisors (31445888714581).

220121221002011 is an equidigital number, since it uses as much as digits as its factorization.

220121221002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31445888714580.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220121221002011 its reverse (110200122121022), we get a palindrome (330321343123033).

The spelling of 220121221002011 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, two thousand, eleven".