101220011191 has 16 divisors (see below), whose sum is σ = 110509951104. Its totient is φ = 92152599264.

The previous prime is 101220011147. The next prime is 101220011237. The reversal of 101220011191 is 191110022101.

It is a cyclic number.

It is not a de Polignac number, because 101220011191 - 2⁷ = 101220011063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220011791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155476 + ... + 476038.

It is an arithmetic number, because the mean of its divisors is an integer number (6906871944).

Almost surely, 2^101220011191 is an apocalyptic number.

101220011191 is a deficient number, since it is larger than the sum of its proper divisors (9289939913).

101220011191 is a wasteful number, since it uses less digits than its factorization.

101220011191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320910.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 101220011191 its reverse (191110022101), we get a palindrome (292330033292).

The spelling of 101220011191 in words is "one hundred one billion, two hundred twenty million, eleven thousand, one hundred ninety-one".