101111043643 has 2 divisors, whose sum is σ = 101111043644. Its totient is φ = 101111043642.

The previous prime is 101111043637. The next prime is 101111043653. The reversal of 101111043643 is 346340111101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101111043643 - 2⁵ = 101111043611 is a prime.

It is a super-2 number, since 2×101111043643² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101111043623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50555521821 + 50555521822.

It is an arithmetic number, because the mean of its divisors is an integer number (50555521822).

Almost surely, 2^101111043643 is an apocalyptic number.

101111043643 is a deficient number, since it is larger than the sum of its proper divisors (1).

101111043643 is an equidigital number, since it uses as much as digits as its factorization.

101111043643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 101111043643 its reverse (346340111101), we get a palindrome (447451154744).

The spelling of 101111043643 in words is "one hundred one billion, one hundred eleven million, forty-three thousand, six hundred forty-three".