213515015122 has 8 divisors (see below), whose sum is σ = 321131163276. Its totient is φ = 106471294032.

The previous prime is 213515015111. The next prime is 213515015137. The reversal of 213515015122 is 221510515312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 208866366361 + 4648648761 = 457019^2 + 68181^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143105833 + ... + 143107324.

Almost surely, 2^213515015122 is an apocalyptic number.

213515015122 is a deficient number, since it is larger than the sum of its proper divisors (107616148154).

213515015122 is a wasteful number, since it uses less digits than its factorization.

213515015122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286213532.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 213515015122 in words is "two hundred thirteen billion, five hundred fifteen million, fifteen thousand, one hundred twenty-two".