1131231020021 has 8 divisors (see below), whose sum is σ = 1152747439200. Its totient is φ = 1109792701360.

The previous prime is 1131231019943. The next prime is 1131231020027. The reversal of 1131231020021 is 1200201321311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131231020021 - 2³⁰ = 1130157278197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231020027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19495886 + ... + 19553823.

It is an arithmetic number, because the mean of its divisors is an integer number (144093429900).

Almost surely, 2^{1131231020021} is an apocalyptic number.

It is an amenable number.

1131231020021 is a deficient number, since it is larger than the sum of its proper divisors (21516419179).

1131231020021 is an equidigital number, since it uses as much as digits as its factorization.

1131231020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39050259.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1131231020021 its reverse (1200201321311), we get a palindrome (2331432341332).

The spelling of 1131231020021 in words is "one trillion, one hundred thirty-one billion, two hundred thirty-one million, twenty thousand, twenty-one".