11142602021 has 4 divisors (see below), whose sum is σ = 11414372844. Its totient is φ = 10870831200.

The previous prime is 11142601979. The next prime is 11142602039. The reversal of 11142602021 is 12020624111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12020624111 = 409 ⋅29390279.

It can be written as a sum of positive squares in 2 ways, for example, as 4842211396 + 6300390625 = 69586^2 + 79375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11142602021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11142601984 and 11142602002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142602071) 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, 135885350 + ... + 135885431.

It is an arithmetic number, because the mean of its divisors is an integer number (2853593211).

Almost surely, 2^11142602021 is an apocalyptic number.

It is an amenable number.

11142602021 is a deficient number, since it is larger than the sum of its proper divisors (271770823).

11142602021 is an equidigital number, since it uses as much as digits as its factorization.

11142602021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271770822.

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

The spelling of 11142602021 in words is "eleven billion, one hundred forty-two million, six hundred two thousand, twenty-one".