11231021001 has 4 divisors (see below), whose sum is σ = 14974694672. Its totient is φ = 7487347332.

The previous prime is 11231020951. The next prime is 11231021057. The reversal of 11231021001 is 10012013211.

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 not a de Polignac number, because 11231021001 - 2¹⁹ = 11230496713 is a prime.

It is a super-2 number, since 2×11231021001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11231020001) 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, 1871836831 + ... + 1871836836.

It is an arithmetic number, because the mean of its divisors is an integer number (3743673668).

Almost surely, 2^11231021001 is an apocalyptic number.

It is an amenable number.

11231021001 is a deficient number, since it is larger than the sum of its proper divisors (3743673671).

11231021001 is an equidigital number, since it uses as much as digits as its factorization.

11231021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743673670.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11231021001 its reverse (10012013211), we get a palindrome (21243034212).

The spelling of 11231021001 in words is "eleven billion, two hundred thirty-one million, twenty-one thousand, one".