220101210210121 has 2 divisors, whose sum is σ = 220101210210122. Its totient is φ = 220101210210120.

The previous prime is 220101210210109. The next prime is 220101210210143. The reversal of 220101210210121 is 121012012101022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196295203070521 + 23806007139600 = 14010539^2 + 4879140^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101210210121 - 2²³ = 220101201821513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220101210210095 and 220101210210104.

It is not a weakly prime, because it can be changed into another prime (220101210210181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050605105060 + 110050605105061.

It is an arithmetic number, because the mean of its divisors is an integer number (110050605105061).

Almost surely, 2^{220101210210121} is an apocalyptic number.

It is an amenable number.

220101210210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101210210121 is an equidigital number, since it uses as much as digits as its factorization.

220101210210121 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 16.

Adding to 220101210210121 its reverse (121012012101022), we get a palindrome (341113222311143).

The spelling of 220101210210121 in words is "two hundred twenty trillion, one hundred one billion, two hundred ten million, two hundred ten thousand, one hundred twenty-one".