1210020002101 has 2 divisors, whose sum is σ = 1210020002102. Its totient is φ = 1210020002100.

The previous prime is 1210020002099. The next prime is 1210020002119. The reversal of 1210020002101 is 1012000200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055355563025 + 154664439076 = 1027305^2 + 393274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210020002101 - 2¹ = 1210020002099 is a prime.

Together with 1210020002099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210020002131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605010001050 + 605010001051.

It is an arithmetic number, because the mean of its divisors is an integer number (605010001051).

Almost surely, 2^{1210020002101} is an apocalyptic number.

It is an amenable number.

1210020002101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210020002101 is an equidigital number, since it uses as much as digits as its factorization.

1210020002101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1210020002101 its reverse (1012000200121), we get a palindrome (2222020202222).

The spelling of 1210020002101 in words is "one trillion, two hundred ten billion, twenty million, two thousand, one hundred one".