1210203101 has 2 divisors, whose sum is σ = 1210203102. Its totient is φ = 1210203100.

The previous prime is 1210203097. The next prime is 1210203131. The reversal of 1210203101 is 1013020121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889828900 + 320374201 = 29830^2 + 17899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210203101 - 2² = 1210203097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210203131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605101550 + 605101551.

It is an arithmetic number, because the mean of its divisors is an integer number (605101551).

Almost surely, 2^1210203101 is an apocalyptic number.

It is an amenable number.

1210203101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210203101 is an equidigital number, since it uses as much as digits as its factorization.

1210203101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1210203101 is about 34787.9735109707. The cubic root of 1210203101 is about 1065.6618546101.

Adding to 1210203101 its reverse (1013020121), we get a palindrome (2223223222).

The spelling of 1210203101 in words is "one billion, two hundred ten million, two hundred three thousand, one hundred one".