101012021111 has 4 divisors (see below), whose sum is σ = 101175736512. Its totient is φ = 100848305712.

The previous prime is 101012021087. The next prime is 101012021129. The reversal of 101012021111 is 111120210101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111120210101 = 1999 ⋅55587899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101012021111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101012021092 and 101012021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012021911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81856775 + ... + 81858008.

It is an arithmetic number, because the mean of its divisors is an integer number (25293934128).

Almost surely, 2^101012021111 is an apocalyptic number.

101012021111 is a deficient number, since it is larger than the sum of its proper divisors (163715401).

101012021111 is an equidigital number, since it uses as much as digits as its factorization.

101012021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163715400.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 101012021111 its reverse (111120210101), we get a palindrome (212132231212).

The spelling of 101012021111 in words is "one hundred one billion, twelve million, twenty-one thousand, one hundred eleven".