1000110120021 has 24 divisors (see below), whose sum is σ = 1454757528224. Its totient is φ = 662059176480.

The previous prime is 1000110120019. The next prime is 1000110120101. The reversal of 1000110120021 is 1200210110001.

It is a happy number.

It is not a de Polignac number, because 1000110120021 - 2¹ = 1000110120019 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000110119985 and 1000110120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000110122021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1932150 + ... + 2394456.

Almost surely, 2^{1000110120021} is an apocalyptic number.

It is an amenable number.

1000110120021 is a deficient number, since it is larger than the sum of its proper divisors (454647408203).

1000110120021 is a wasteful number, since it uses less digits than its factorization.

1000110120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464001 (or 463998 counting only the distinct ones).

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

Adding to 1000110120021 its reverse (1200210110001), we get a palindrome (2200320230022).

The spelling of 1000110120021 in words is "one trillion, one hundred ten million, one hundred twenty thousand, twenty-one".