220021200123001 has 2 divisors, whose sum is σ = 220021200123002. Its totient is φ = 220021200123000.

The previous prime is 220021200122993. The next prime is 220021200123007. The reversal of 220021200123001 is 100321002120022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200443442418025 + 19577757704976 = 14157805^2 + 4424676^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021200123001 - 2³ = 220021200122993 is a prime.

It is not a weakly prime, because it can be changed into another prime (220021200123007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010600061500 + 110010600061501.

It is an arithmetic number, because the mean of its divisors is an integer number (110010600061501).

Almost surely, 2^{220021200123001} is an apocalyptic number.

It is an amenable number.

220021200123001 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021200123001 is an equidigital number, since it uses as much as digits as its factorization.

220021200123001 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 16.

Adding to 220021200123001 its reverse (100321002120022), we get a palindrome (320342202243023).

The spelling of 220021200123001 in words is "two hundred twenty trillion, twenty-one billion, two hundred million, one hundred twenty-three thousand, one".