215002122122 has 4 divisors (see below), whose sum is σ = 322503183186. Its totient is φ = 107501061060.

The previous prime is 215002122107. The next prime is 215002122163. The reversal of 215002122122 is 221221200512.

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., 183577114681 + 31425007441 = 428459^2 + 177271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215002122094 and 215002122103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53750530529 + ... + 53750530532.

Almost surely, 2^215002122122 is an apocalyptic number.

215002122122 is a deficient number, since it is larger than the sum of its proper divisors (107501061064).

215002122122 is a wasteful number, since it uses less digits than its factorization.

215002122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107501061063.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 215002122122 its reverse (221221200512), we get a palindrome (436223322634).

The spelling of 215002122122 in words is "two hundred fifteen billion, two million, one hundred twenty-two thousand, one hundred twenty-two".