101220001101 has 48 divisors (see below), whose sum is σ = 156817689600. Its totient is φ = 62721457056.

The previous prime is 101220001093. The next prime is 101220001109. The reversal of 101220001101 is 101100022101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101220001093) and next prime (101220001109).

It is not a de Polignac number, because 101220001101 - 2³ = 101220001093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220001109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5266956 + ... + 5286138.

It is an arithmetic number, because the mean of its divisors is an integer number (3267035200).

Almost surely, 2^101220001101 is an apocalyptic number.

It is an amenable number.

101220001101 is a deficient number, since it is larger than the sum of its proper divisors (55597688499).

101220001101 is a wasteful number, since it uses less digits than its factorization.

101220001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19790 (or 19787 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101220001101 its reverse (101100022101), we get a palindrome (202320023202).

The spelling of 101220001101 in words is "one hundred one billion, two hundred twenty million, one thousand, one hundred one".