210021201101 has 2 divisors, whose sum is σ = 210021201102. Its totient is φ = 210021201100.

The previous prime is 210021201077. The next prime is 210021201139. The reversal of 210021201101 is 101102120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202603513225 + 7417687876 = 450115^2 + 86126^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021201101 - 2¹⁴ = 210021184717 is a prime.

It is a super-2 number, since 2×210021201101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021201001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010600550 + 105010600551.

It is an arithmetic number, because the mean of its divisors is an integer number (105010600551).

Almost surely, 2^210021201101 is an apocalyptic number.

It is an amenable number.

210021201101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021201101 is an equidigital number, since it uses as much as digits as its factorization.

210021201101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021201101 its reverse (101102120012), we get a palindrome (311123321113).

The spelling of 210021201101 in words is "two hundred ten billion, twenty-one million, two hundred one thousand, one hundred one".