21001202010101 has 2 divisors, whose sum is σ = 21001202010102. Its totient is φ = 21001202010100.

The previous prime is 21001202010083. The next prime is 21001202010119. The reversal of 21001202010101 is 10101020210012.

It is a balanced prime because it is at equal distance from previous prime (21001202010083) and next prime (21001202010119).

It can be written as a sum of positive squares in only one way, i.e., 12229002006001 + 8772200004100 = 3496999^2 + 2961790^2 .

It is a cyclic number.

It is not a de Polignac number, because 21001202010101 - 2²² = 21001197815797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001202000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500601005050 + 10500601005051.

It is an arithmetic number, because the mean of its divisors is an integer number (10500601005051).

Almost surely, 2^{21001202010101} is an apocalyptic number.

It is an amenable number.

21001202010101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001202010101 is an equidigital number, since it uses as much as digits as its factorization.

21001202010101 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 21001202010101 its reverse (10101020210012), we get a palindrome (31102222220113).

The spelling of 21001202010101 in words is "twenty-one trillion, one billion, two hundred two million, ten thousand, one hundred one".