1210101421 has 2 divisors, whose sum is σ = 1210101422. Its totient is φ = 1210101420.

The previous prime is 1210101407. The next prime is 1210101479. The reversal of 1210101421 is 1241010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197921321 + 12180100 = 34611^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210101421 - 2²¹ = 1208004269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210101121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605050710 + 605050711.

It is an arithmetic number, because the mean of its divisors is an integer number (605050711).

Almost surely, 2^1210101421 is an apocalyptic number.

It is an amenable number.

1210101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210101421 is an equidigital number, since it uses as much as digits as its factorization.

1210101421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1210101421 is about 34786.5120556804. The cubic root of 1210101421 is about 1065.6320085090.

Adding to 1210101421 its reverse (1241010121), we get a palindrome (2451111542).

The spelling of 1210101421 in words is "one billion, two hundred ten million, one hundred one thousand, four hundred twenty-one".