220121021123 has 2 divisors, whose sum is σ = 220121021124. Its totient is φ = 220121021122.

The previous prime is 220121021101. The next prime is 220121021143. The reversal of 220121021123 is 321120121022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220121021123 - 2¹² = 220121017027 is a prime.

It is a super-2 number, since 2×220121021123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220121021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060510561 + 110060510562.

It is an arithmetic number, because the mean of its divisors is an integer number (110060510562).

Almost surely, 2^220121021123 is an apocalyptic number.

220121021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121021123 is an equidigital number, since it uses as much as digits as its factorization.

220121021123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 220121021123 its reverse (321120121022), we get a palindrome (541241142145).

The spelling of 220121021123 in words is "two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-three".