213106073042 has 4 divisors (see below), whose sum is σ = 319659109566. Its totient is φ = 106553036520.

The previous prime is 213106073029. The next prime is 213106073053. The reversal of 213106073042 is 240370601312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 189669831121 + 23436241921 = 435511^2 + 153089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213106072996 and 213106073014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53276518259 + ... + 53276518262.

Almost surely, 2^213106073042 is an apocalyptic number.

213106073042 is a deficient number, since it is larger than the sum of its proper divisors (106553036524).

213106073042 is a wasteful number, since it uses less digits than its factorization.

213106073042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106553036523.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 213106073042 its reverse (240370601312), we get a palindrome (453476674354).

The spelling of 213106073042 in words is "two hundred thirteen billion, one hundred six million, seventy-three thousand, forty-two".