1101020111001 has 6 divisors (see below), whose sum is σ = 1590362382570. Its totient is φ = 734013407328.

The previous prime is 1101020110969. The next prime is 1101020111017. The reversal of 1101020111001 is 1001110201011.

It can be written as a sum of positive squares in only one way, i.e., 803624395401 + 297395715600 = 896451^2 + 545340^2 .

It is not a de Polignac number, because 1101020111001 - 2⁵ = 1101020110969 is a prime.

It is a super-2 number, since 2×1101020111001² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 122335567889 = 1101020111001 / (1 + 1 + 0 + 1 + 0 + 2 + 0 + 1 + 1 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (1101020111041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61167783936 + ... + 61167783953.

It is an arithmetic number, because the mean of its divisors is an integer number (265060397095).

Almost surely, 2^{1101020111001} is an apocalyptic number.

It is an amenable number.

1101020111001 is a deficient number, since it is larger than the sum of its proper divisors (489342271569).

1101020111001 is a wasteful number, since it uses less digits than its factorization.

1101020111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122335567895 (or 122335567892 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1101020111001 its reverse (1001110201011), we get a palindrome (2102130312012).

The spelling of 1101020111001 in words is "one trillion, one hundred one billion, twenty million, one hundred eleven thousand, one".