212122100015 has 16 divisors (see below), whose sum is σ = 290946819648. Its totient is φ = 145436898816.

The previous prime is 212122099963. The next prime is 212122100039. The reversal of 212122100015 is 510001221212.

It is a cyclic number.

It is not a de Polignac number, because 212122100015 - 2⁸ = 212122099759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212122099966 and 212122100002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94442 + ... + 658151.

It is an arithmetic number, because the mean of its divisors is an integer number (18184176228).

Almost surely, 2^212122100015 is an apocalyptic number.

212122100015 is a deficient number, since it is larger than the sum of its proper divisors (78824719633).

212122100015 is an equidigital number, since it uses as much as digits as its factorization.

212122100015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760658.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 212122100015 its reverse (510001221212), we get a palindrome (722123321227).

The spelling of 212122100015 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred thousand, fifteen".