21212326950015 has 16 divisors (see below), whose sum is σ = 33962007938688. Its totient is φ = 11305812767136.

The previous prime is 21212326949987. The next prime is 21212326950037. The reversal of 21212326950015 is 51005962321212.

It is not a de Polignac number, because 21212326950015 - 2¹³ = 21212326941823 is a prime.

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, 464243449 + ... + 464289138.

It is an arithmetic number, because the mean of its divisors is an integer number (2122625496168).

Almost surely, 2^{21212326950015} is an apocalyptic number.

21212326950015 is a deficient number, since it is larger than the sum of its proper divisors (12749680988673).

21212326950015 is a wasteful number, since it uses less digits than its factorization.

21212326950015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928534118.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 21212326950015 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty-six million, nine hundred fifty thousand, fifteen".