21010143101 has 2 divisors, whose sum is σ = 21010143102. Its totient is φ = 21010143100.

The previous prime is 21010143083. The next prime is 21010143127. The reversal of 21010143101 is 10134101012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13941705625 + 7068437476 = 118075^2 + 84074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010143101 is a prime.

It is a super-2 number, since 2×21010143101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010143131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505071550 + 10505071551.

It is an arithmetic number, because the mean of its divisors is an integer number (10505071551).

Almost surely, 2^21010143101 is an apocalyptic number.

It is an amenable number.

21010143101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010143101 is an equidigital number, since it uses as much as digits as its factorization.

21010143101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21010143101 its reverse (10134101012), we get a palindrome (31144244113).

The spelling of 21010143101 in words is "twenty-one billion, ten million, one hundred forty-three thousand, one hundred one".