1011242361621 has 4 divisors (see below), whose sum is σ = 1348323148832. Its totient is φ = 674161574412.

The previous prime is 1011242361601. The next prime is 1011242361653. The reversal of 1011242361621 is 1261632421101.

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 1011242361621 - 2⁶ = 1011242361557 is a prime.

It is a super-2 number, since 2×1011242361621² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011242361601) 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, 168540393601 + ... + 168540393606.

It is an arithmetic number, because the mean of its divisors is an integer number (337080787208).

Almost surely, 2^{1011242361621} is an apocalyptic number.

It is an amenable number.

1011242361621 is a deficient number, since it is larger than the sum of its proper divisors (337080787211).

1011242361621 is an equidigital number, since it uses as much as digits as its factorization.

1011242361621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337080787210.

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 1011242361621 its reverse (1261632421101), we get a palindrome (2272874782722).

The spelling of 1011242361621 in words is "one trillion, eleven billion, two hundred forty-two million, three hundred sixty-one thousand, six hundred twenty-one".