101111101711421 has 2 divisors, whose sum is σ = 101111101711422. Its totient is φ = 101111101711420.

The previous prime is 101111101711379. The next prime is 101111101711441. The reversal of 101111101711421 is 124117101111101.

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., 51113276916025 + 49997824795396 = 7149355^2 + 7070914^2 .

It is a cyclic number.

It is not a de Polignac number, because 101111101711421 - 2³⁰ = 101110027969597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101111101711441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50555550855710 + 50555550855711.

It is an arithmetic number, because the mean of its divisors is an integer number (50555550855711).

Almost surely, 2^{101111101711421} is an apocalyptic number.

It is an amenable number.

101111101711421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101111101711421 is an equidigital number, since it uses as much as digits as its factorization.

101111101711421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 23.

Adding to 101111101711421 its reverse (124117101111101), we get a palindrome (225228202822522).

The spelling of 101111101711421 in words is "one hundred one trillion, one hundred eleven billion, one hundred one million, seven hundred eleven thousand, four hundred twenty-one".