213021512042 has 8 divisors (see below), whose sum is σ = 319574551332. Its totient is φ = 106496661600.

The previous prime is 213021512017. The next prime is 213021512047. The reversal of 213021512042 is 240215120312.

213021512042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 196152437881 + 16869074161 = 442891^2 + 129881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 213021511999 and 213021512017.

It is not an unprimeable number, because it can be changed into a prime (213021512047) 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, 7028309 + ... + 7058552.

Almost surely, 2^213021512042 is an apocalyptic number.

213021512042 is a deficient number, since it is larger than the sum of its proper divisors (106553039290).

213021512042 is a wasteful number, since it uses less digits than its factorization.

213021512042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14094424.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 213021512042 its reverse (240215120312), we get a palindrome (453236632354).

The spelling of 213021512042 in words is "two hundred thirteen billion, twenty-one million, five hundred twelve thousand, forty-two".