220120121011121 has 2 divisors, whose sum is σ = 220120121011122. Its totient is φ = 220120121011120.

The previous prime is 220120121011067. The next prime is 220120121011127. The reversal of 220120121011121 is 121110121021022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171173026722721 + 48947094288400 = 13083311^2 + 6996220^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120121011121 - 2⁴² = 215722074500017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220120121011121.

It is not a weakly prime, because it can be changed into another prime (220120121011127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060060505560 + 110060060505561.

It is an arithmetic number, because the mean of its divisors is an integer number (110060060505561).

Almost surely, 2^{220120121011121} is an apocalyptic number.

It is an amenable number.

220120121011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120121011121 is an equidigital number, since it uses as much as digits as its factorization.

220120121011121 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 17.

Adding to 220120121011121 its reverse (121110121021022), we get a palindrome (341230242032143).

Subtracting from 220120121011121 its reverse (121110121021022), we obtain a palindrome (99009999990099).

The spelling of 220120121011121 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-one million, eleven thousand, one hundred twenty-one".