1321111021031 has 8 divisors (see below), whose sum is σ = 1370352817680. Its totient is φ = 1272710964672.

The previous prime is 1321111020997. The next prime is 1321111021033. The reversal of 1321111021031 is 1301201111231.

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 1321111021031 - 2⁶ = 1321111020967 is a prime.

It is a super-2 number, since 2×1321111021031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321111021033) 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, 210431876 + ... + 210438153.

It is an arithmetic number, because the mean of its divisors is an integer number (171294102210).

Almost surely, 2^{1321111021031} is an apocalyptic number.

1321111021031 is a deficient number, since it is larger than the sum of its proper divisors (49241796649).

1321111021031 is an equidigital number, since it uses as much as digits as its factorization.

1321111021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420870145.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1321111021031 its reverse (1301201111231), we get a palindrome (2622312132262).

The spelling of 1321111021031 in words is "one trillion, three hundred twenty-one billion, one hundred eleven million, twenty-one thousand, thirty-one".