118210183821 has 12 divisors (see below), whose sum is σ = 175362855772. Its totient is φ = 76676875776.

The previous prime is 118210183813. The next prime is 118210183829. The reversal of 118210183821 is 128381012811.

It is an interprime number because it is at equal distance from previous prime (118210183813) and next prime (118210183829).

It can be written as a sum of positive squares in 2 ways, for example, as 90549837225 + 27660346596 = 300915^2 + 166314^2 .

It is not a de Polignac number, because 118210183821 - 2³ = 118210183813 is a prime.

It is a super-2 number, since 2×118210183821² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118210183829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177492436 + ... + 177493101.

Almost surely, 2^118210183821 is an apocalyptic number.

It is an amenable number.

118210183821 is a deficient number, since it is larger than the sum of its proper divisors (57152671951).

118210183821 is a wasteful number, since it uses less digits than its factorization.

118210183821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354985580 (or 354985577 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

The spelling of 118210183821 in words is "one hundred eighteen billion, two hundred ten million, one hundred eighty-three thousand, eight hundred twenty-one".