220011122021 has 2 divisors, whose sum is σ = 220011122022. Its totient is φ = 220011122020.

The previous prime is 220011121997. The next prime is 220011122069. The reversal of 220011122021 is 120221110022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114405621121 + 105605500900 = 338239^2 + 324970^2 .

It is a cyclic number.

It is not a de Polignac number, because 220011122021 - 2¹⁰ = 220011120997 is a prime.

It is a super-2 number, since 2×220011122021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220011121987 and 220011122005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220011182021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110005561010 + 110005561011.

It is an arithmetic number, because the mean of its divisors is an integer number (110005561011).

Almost surely, 2^220011122021 is an apocalyptic number.

It is an amenable number.

220011122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220011122021 is an equidigital number, since it uses as much as digits as its factorization.

220011122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220011122021 its reverse (120221110022), we get a palindrome (340232232043).

The spelling of 220011122021 in words is "two hundred twenty billion, eleven million, one hundred twenty-two thousand, twenty-one".