10211201012261 has 2 divisors, whose sum is σ = 10211201012262. Its totient is φ = 10211201012260.

The previous prime is 10211201012249. The next prime is 10211201012281. The reversal of 10211201012261 is 16221010211201.

It is an a-pointer prime, because the next prime (10211201012281) can be obtained adding 10211201012261 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9349107332161 + 862093680100 = 3057631^2 + 928490^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211201012261 - 2⁶ = 10211201012197 is a prime.

It is a super-2 number, since 2×10211201012261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211201012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105600506130 + 5105600506131.

It is an arithmetic number, because the mean of its divisors is an integer number (5105600506131).

Almost surely, 2^{10211201012261} is an apocalyptic number.

It is an amenable number.

10211201012261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211201012261 is an equidigital number, since it uses as much as digits as its factorization.

10211201012261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 10211201012261 its reverse (16221010211201), we get a palindrome (26432211223462).

The spelling of 10211201012261 in words is "ten trillion, two hundred eleven billion, two hundred one million, twelve thousand, two hundred sixty-one".