210201121201021 has 2 divisors, whose sum is σ = 210201121201022. Its totient is φ = 210201121201020.

The previous prime is 210201121200943. The next prime is 210201121201067. The reversal of 210201121201021 is 120102121102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209387093205796 + 814027995225 = 14470214^2 + 902235^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201121201021 - 2¹⁹ = 210201120676733 is a prime.

It is a super-2 number, since 2×210201121201021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210201121200986 and 210201121201004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210201121271021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100560600510 + 105100560600511.

It is an arithmetic number, because the mean of its divisors is an integer number (105100560600511).

Almost surely, 2^{210201121201021} is an apocalyptic number.

It is an amenable number.

210201121201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210201121201021 is an equidigital number, since it uses as much as digits as its factorization.

210201121201021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210201121201021 its reverse (120102121102012), we get a palindrome (330303242303033).

Subtracting from 210201121201021 its reverse (120102121102012), we obtain a palindrome (90099000099009).

The spelling of 210201121201021 in words is "two hundred ten trillion, two hundred one billion, one hundred twenty-one million, two hundred one thousand, twenty-one".