2010101219981 has 2 divisors, whose sum is σ = 2010101219982. Its totient is φ = 2010101219980.

The previous prime is 2010101219911. The next prime is 2010101220011. The reversal of 2010101219981 is 1899121010102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1603237116100 + 406864103881 = 1266190^2 + 637859^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010101219981 - 2³⁸ = 1735223313037 is a prime.

It is a super-2 number, since 2×2010101219981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010101219911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005050609990 + 1005050609991.

It is an arithmetic number, because the mean of its divisors is an integer number (1005050609991).

Almost surely, 2^{2010101219981} is an apocalyptic number.

It is an amenable number.

2010101219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010101219981 is an equidigital number, since it uses as much as digits as its factorization.

2010101219981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 35.

It can be divided in two parts, 201010121 and 9981, that added together give a palindrome (201020102).

The spelling of 2010101219981 in words is "two trillion, ten billion, one hundred one million, two hundred nineteen thousand, nine hundred eighty-one".