220121200122101 has 2 divisors, whose sum is σ = 220121200122102. Its totient is φ = 220121200122100.

The previous prime is 220121200122053. The next prime is 220121200122181. The reversal of 220121200122101 is 101221002121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185833441541476 + 34287758580625 = 13632074^2 + 5855575^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121200122101 - 2⁴⁶ = 149752455944437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220121200122101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121200122181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060600061050 + 110060600061051.

It is an arithmetic number, because the mean of its divisors is an integer number (110060600061051).

Almost surely, 2^{220121200122101} is an apocalyptic number.

It is an amenable number.

220121200122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121200122101 is an equidigital number, since it uses as much as digits as its factorization.

220121200122101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220121200122101 its reverse (101221002121022), we get a palindrome (321342202243123).

The spelling of 220121200122101 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred one".