1021110110001 has 32 divisors (see below), whose sum is σ = 1535947660800. Its totient is φ = 670311821520.

The previous prime is 1021110109993. The next prime is 1021110110029. The reversal of 1021110110001 is 1000110111201.

It is not a de Polignac number, because 1021110110001 - 2³ = 1021110109993 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 (1021110111001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4467070 + ... + 4690088.

It is an arithmetic number, because the mean of its divisors is an integer number (47998364400).

Almost surely, 2^{1021110110001} is an apocalyptic number.

It is an amenable number.

1021110110001 is a deficient number, since it is larger than the sum of its proper divisors (514837550799).

1021110110001 is a wasteful number, since it uses less digits than its factorization.

1021110110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225626 (or 225620 counting only the distinct ones).

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

Adding to 1021110110001 its reverse (1000110111201), we get a palindrome (2021220221202).

The spelling of 1021110110001 in words is "one trillion, twenty-one billion, one hundred ten million, one hundred ten thousand, one".