101021200111091 has 12 divisors (see below), whose sum is σ = 109825636301640. Its totient is φ = 92878823232000.

The previous prime is 101021200111043. The next prime is 101021200111157. The reversal of 101021200111091 is 190111002120101.

It is a de Polignac number, because none of the positive numbers 2^k-101021200111091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101021200111291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1190711726 + ... + 1190796563.

It is an arithmetic number, because the mean of its divisors is an integer number (9152136358470).

Almost surely, 2^{101021200111091} is an apocalyptic number.

101021200111091 is a deficient number, since it is larger than the sum of its proper divisors (8804436190549).

101021200111091 is a wasteful number, since it uses less digits than its factorization.

101021200111091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381508566 (or 2381508553 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 101021200111091 its reverse (190111002120101), we get a palindrome (291132202231192).

The spelling of 101021200111091 in words is "one hundred one trillion, twenty-one billion, two hundred million, one hundred eleven thousand, ninety-one".