11259019821 has 32 divisors (see below), whose sum is σ = 17671495680. Its totient is φ = 6241651776.

The previous prime is 11259019801. The next prime is 11259019841. The reversal of 11259019821 is 12891095211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11259019801) and next prime (11259019841).

It is not a de Polignac number, because 11259019821 - 2⁹ = 11259019309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11259019821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11259019801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248740 + ... + 290498.

It is an arithmetic number, because the mean of its divisors is an integer number (552234240).

Almost surely, 2^11259019821 is an apocalyptic number.

It is an amenable number.

11259019821 is a deficient number, since it is larger than the sum of its proper divisors (6412475859).

11259019821 is a wasteful number, since it uses less digits than its factorization.

11259019821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42153.

The product of its (nonzero) digits is 12960, while the sum is 39.

The spelling of 11259019821 in words is "eleven billion, two hundred fifty-nine million, nineteen thousand, eight hundred twenty-one".