1021234875218 has 4 divisors (see below), whose sum is σ = 1531852312830. Its totient is φ = 510617437608.

The previous prime is 1021234875217. The next prime is 1021234875233. The reversal of 1021234875218 is 8125784321201.

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., 825257782969 + 195977092249 = 908437^2 + 442693^2 .

It is not an unprimeable number, because it can be changed into a prime (1021234875217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255308718803 + ... + 255308718806.

Almost surely, 2^{1021234875218} is an apocalyptic number.

1021234875218 is a deficient number, since it is larger than the sum of its proper divisors (510617437612).

1021234875218 is an equidigital number, since it uses as much as digits as its factorization.

1021234875218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510617437611.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 1021234875218 in words is "one trillion, twenty-one billion, two hundred thirty-four million, eight hundred seventy-five thousand, two hundred eighteen".