1011620421145 has 4 divisors (see below), whose sum is σ = 1213944505380. Its totient is φ = 809296336912.

The previous prime is 1011620421143. The next prime is 1011620421151. The reversal of 1011620421145 is 5411240261101.

1011620421145 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 153410872329 + 858209548816 = 391677^2 + 926396^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011620421145 - 2¹ = 1011620421143 is a prime.

It is a super-2 number, since 2×1011620421145² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011620421143) 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, 101162042110 + ... + 101162042119.

It is an arithmetic number, because the mean of its divisors is an integer number (303486126345).

Almost surely, 2^{1011620421145} is an apocalyptic number.

It is an amenable number.

1011620421145 is a deficient number, since it is larger than the sum of its proper divisors (202324084235).

1011620421145 is an equidigital number, since it uses as much as digits as its factorization.

1011620421145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202324084234.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 1011620421145 its reverse (5411240261101), we get a palindrome (6422860682246).

The spelling of 1011620421145 in words is "one trillion, eleven billion, six hundred twenty million, four hundred twenty-one thousand, one hundred forty-five".