1101220010001 has 48 divisors (see below), whose sum is σ = 1643257249920. Its totient is φ = 710111888640.

The previous prime is 1101220009973. The next prime is 1101220010003. The reversal of 1101220010001 is 1000100221011.

It is a happy number.

It is not a de Polignac number, because 1101220010001 - 2¹⁹ = 1101219485713 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1101220010003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42988485 + ... + 43014093.

It is an arithmetic number, because the mean of its divisors is an integer number (34234526040).

Almost surely, 2^{1101220010001} is an apocalyptic number.

It is an amenable number.

1101220010001 is a deficient number, since it is larger than the sum of its proper divisors (542037239919).

1101220010001 is a wasteful number, since it uses less digits than its factorization.

1101220010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26406 (or 26403 counting only the distinct ones).

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

Adding to 1101220010001 its reverse (1000100221011), we get a palindrome (2101320231012).

The spelling of 1101220010001 in words is "one trillion, one hundred one billion, two hundred twenty million, ten thousand, one".