20121001202101 has 2 divisors, whose sum is σ = 20121001202102. Its totient is φ = 20121001202100.

The previous prime is 20121001202033. The next prime is 20121001202123. The reversal of 20121001202101 is 10120210012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19442799541201 + 678201660900 = 4409399^2 + 823530^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121001202101 - 2¹⁵ = 20121001169333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121001202191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060500601050 + 10060500601051.

It is an arithmetic number, because the mean of its divisors is an integer number (10060500601051).

Almost surely, 2^{20121001202101} is an apocalyptic number.

It is an amenable number.

20121001202101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121001202101 is an equidigital number, since it uses as much as digits as its factorization.

20121001202101 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 13.

Adding to 20121001202101 its reverse (10120210012102), we get a palindrome (30241211214203).

The spelling of 20121001202101 in words is "twenty trillion, one hundred twenty-one billion, one million, two hundred two thousand, one hundred one".