1021101110001 has 12 divisors (see below), whose sum is σ = 1685627229312. Its totient is φ = 583486348536.

The previous prime is 1021101109949. The next prime is 1021101110011. The reversal of 1021101110001 is 1000111011201.

It is not a de Polignac number, because 1021101110001 - 2⁶ = 1021101109937 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 (1021101110011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8103977001 + ... + 8103977126.

It is an arithmetic number, because the mean of its divisors is an integer number (140468935776).

Almost surely, 2^{1021101110001} is an apocalyptic number.

It is an amenable number.

1021101110001 is a deficient number, since it is larger than the sum of its proper divisors (664526119311).

1021101110001 is a wasteful number, since it uses less digits than its factorization.

1021101110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16207954140 (or 16207954137 counting only the distinct ones).

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

Adding to 1021101110001 its reverse (1000111011201), we get a palindrome (2021212121202).

The spelling of 1021101110001 in words is "one trillion, twenty-one billion, one hundred one million, one hundred ten thousand, one".