200120202210121 has 2 divisors, whose sum is σ = 200120202210122. Its totient is φ = 200120202210120.

The previous prime is 200120202210109. The next prime is 200120202210127. The reversal of 200120202210121 is 121012202021002.

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., 155577325548096 + 44542876662025 = 12473064^2 + 6674045^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120202210121 - 2²¹ = 200120200112969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200120202210095 and 200120202210104.

It is not a weakly prime, because it can be changed into another prime (200120202210127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060101105060 + 100060101105061.

It is an arithmetic number, because the mean of its divisors is an integer number (100060101105061).

Almost surely, 2^{200120202210121} is an apocalyptic number.

It is an amenable number.

200120202210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120202210121 is an equidigital number, since it uses as much as digits as its factorization.

200120202210121 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 16.

Adding to 200120202210121 its reverse (121012202021002), we get a palindrome (321132404231123).

The spelling of 200120202210121 in words is "two hundred trillion, one hundred twenty billion, two hundred two million, two hundred ten thousand, one hundred twenty-one".