210021121200101 has 2 divisors, whose sum is σ = 210021121200102. Its totient is φ = 210021121200100.

The previous prime is 210021121200091. The next prime is 210021121200131. The reversal of 210021121200101 is 101002121120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166714837476100 + 43306283724001 = 12911810^2 + 6580751^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021121200101 - 2¹⁰ = 210021121199077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021121200131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010560600050 + 105010560600051.

It is an arithmetic number, because the mean of its divisors is an integer number (105010560600051).

Almost surely, 2^{210021121200101} is an apocalyptic number.

It is an amenable number.

210021121200101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021121200101 is an equidigital number, since it uses as much as digits as its factorization.

210021121200101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210021121200101 its reverse (101002121120012), we get a palindrome (311023242320113).

The spelling of 210021121200101 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, two hundred thousand, one hundred one".