1111020001021 has 4 divisors (see below), whose sum is σ = 1269737144032. Its totient is φ = 952302858012.

The previous prime is 1111020000997. The next prime is 1111020001027. The reversal of 1111020001021 is 1201000201111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111020001021 - 2²¹ = 1111017903869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111020000989 and 1111020001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111020001027) 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, 79358571495 + ... + 79358571508.

It is an arithmetic number, because the mean of its divisors is an integer number (317434286008).

Almost surely, 2^{1111020001021} is an apocalyptic number.

It is an amenable number.

1111020001021 is a deficient number, since it is larger than the sum of its proper divisors (158717143011).

1111020001021 is an equidigital number, since it uses as much as digits as its factorization.

1111020001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158717143010.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1111020001021 its reverse (1201000201111), we get a palindrome (2312020202132).

The spelling of 1111020001021 in words is "one trillion, one hundred eleven billion, twenty million, one thousand, twenty-one".