220121111001111 has 16 divisors (see below), whose sum is σ = 300320793784704. Its totient is φ = 143334429555744.

The previous prime is 220121111001073. The next prime is 220121111001137. The reversal of 220121111001111 is 111100111121022.

It is not a de Polignac number, because 220121111001111 - 2⁶ = 220121111001047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121111001151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101208985 + ... + 103361021.

It is an arithmetic number, because the mean of its divisors is an integer number (18770049611544).

Almost surely, 2^{220121111001111} is an apocalyptic number.

220121111001111 is a deficient number, since it is larger than the sum of its proper divisors (80199682783593).

220121111001111 is a wasteful number, since it uses less digits than its factorization.

220121111001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944990.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 220121111001111 its reverse (111100111121022), we get a palindrome (331221222122133).

The spelling of 220121111001111 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred eleven million, one thousand, one hundred eleven".