1011031042421 has 4 divisors (see below), whose sum is σ = 1011042462144. Its totient is φ = 1011019622700.

The previous prime is 1011031042409. The next prime is 1011031042423. The reversal of 1011031042421 is 1242401301101.

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 a de Polignac number, because none of the positive numbers 2^k-1011031042421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011031042393 and 1011031042402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011031042423) 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, 5576015 + ... + 5754476.

It is an arithmetic number, because the mean of its divisors is an integer number (252760615536).

Almost surely, 2^{1011031042421} is an apocalyptic number.

It is an amenable number.

1011031042421 is a deficient number, since it is larger than the sum of its proper divisors (11419723).

1011031042421 is an equidigital number, since it uses as much as digits as its factorization.

1011031042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11419722.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1011031042421 its reverse (1242401301101), we get a palindrome (2253432343522).

The spelling of 1011031042421 in words is "one trillion, eleven billion, thirty-one million, forty-two thousand, four hundred twenty-one".