1110001121021 has 4 divisors (see below), whose sum is σ = 1195385822652. Its totient is φ = 1024616419392.

The previous prime is 1110001121011. The next prime is 1110001121069. The reversal of 1110001121021 is 1201211000111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 734371872025 + 375629248996 = 856955^2 + 612886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110001121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110001120993 and 1110001121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110001121011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42692350796 + ... + 42692350821.

It is an arithmetic number, because the mean of its divisors is an integer number (298846455663).

Almost surely, 2^{1110001121021} is an apocalyptic number.

It is an amenable number.

1110001121021 is a deficient number, since it is larger than the sum of its proper divisors (85384701631).

1110001121021 is an equidigital number, since it uses as much as digits as its factorization.

1110001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85384701630.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1110001121021 its reverse (1201211000111), we get a palindrome (2311212121132).

The spelling of 1110001121021 in words is "one trillion, one hundred ten billion, one million, one hundred twenty-one thousand, twenty-one".