210121000120001 has 2 divisors, whose sum is σ = 210121000120002. Its totient is φ = 210121000120000.

The previous prime is 210121000119913. The next prime is 210121000120007. The reversal of 210121000120001 is 100021000121012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174782968743601 + 35338031376400 = 13220551^2 + 5944580^2 .

It is a cyclic number.

It is not a de Polignac number, because 210121000120001 - 2⁴² = 205722953608897 is a prime.

It is not a weakly prime, because it can be changed into another prime (210121000120007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060500060000 + 105060500060001.

It is an arithmetic number, because the mean of its divisors is an integer number (105060500060001).

Almost surely, 2^{210121000120001} is an apocalyptic number.

It is an amenable number.

210121000120001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121000120001 is an equidigital number, since it uses as much as digits as its factorization.

210121000120001 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 210121000120001 its reverse (100021000121012), we get a palindrome (310142000241013).

The spelling of 210121000120001 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twenty thousand, one".