220121111021011 has 2 divisors, whose sum is σ = 220121111021012. Its totient is φ = 220121111021010.

The previous prime is 220121111020997. The next prime is 220121111021027. The reversal of 220121111021011 is 110120111121022.

It is an a-pointer prime, because the next prime (220121111021027) can be obtained adding 220121111021011 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220121111021011 - 2²⁷ = 220120976803283 is a prime.

It is not a weakly prime, because it can be changed into another prime (220121111021051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060555510505 + 110060555510506.

It is an arithmetic number, because the mean of its divisors is an integer number (110060555510506).

Almost surely, 2^{220121111021011} is an apocalyptic number.

220121111021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121111021011 is an equidigital number, since it uses as much as digits as its factorization.

220121111021011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 220121111021011 its reverse (110120111121022), we get a palindrome (330241222142033).

The spelling of 220121111021011 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, eleven".