100212520615 has 16 divisors (see below), whose sum is σ = 122425643808. Its totient is φ = 78732366336.

The previous prime is 100212520561. The next prime is 100212520633. The reversal of 100212520615 is 516025212001.

It is a cyclic number.

It is not a de Polignac number, because 100212520615 - 2¹⁹ = 100211996327 is a prime.

It is a super-4 number, since 4×100212520615⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100212520615.

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, 504129 + ... + 674218.

It is an arithmetic number, because the mean of its divisors is an integer number (7651602738).

Almost surely, 2^100212520615 is an apocalyptic number.

100212520615 is a deficient number, since it is larger than the sum of its proper divisors (22213123193).

100212520615 is a wasteful number, since it uses less digits than its factorization.

100212520615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178658.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 100212520615 its reverse (516025212001), we get a palindrome (616237732616).

The spelling of 100212520615 in words is "one hundred billion, two hundred twelve million, five hundred twenty thousand, six hundred fifteen".