1023111120421 has 4 divisors (see below), whose sum is σ = 1101811975852. Its totient is φ = 944410264992.

The previous prime is 1023111120419. The next prime is 1023111120431. The reversal of 1023111120421 is 1240211113201.

1023111120421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 510204489796 + 512906630625 = 714286^2 + 716175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023111120421 - 2¹ = 1023111120419 is a prime.

It is a super-2 number, since 2×1023111120421² (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 (1023111120401) 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, 39350427696 + ... + 39350427721.

It is an arithmetic number, because the mean of its divisors is an integer number (275452993963).

Almost surely, 2^{1023111120421} is an apocalyptic number.

It is an amenable number.

1023111120421 is a deficient number, since it is larger than the sum of its proper divisors (78700855431).

1023111120421 is an equidigital number, since it uses as much as digits as its factorization.

1023111120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78700855430.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1023111120421 its reverse (1240211113201), we get a palindrome (2263322233622).

The spelling of 1023111120421 in words is "one trillion, twenty-three billion, one hundred eleven million, one hundred twenty thousand, four hundred twenty-one".