1209952216101 has 16 divisors (see below), whose sum is σ = 1656156535488. Its totient is φ = 785275612800.

The previous prime is 1209952216063. The next prime is 1209952216103. The reversal of 1209952216101 is 1016122599021.

It is a happy number.

It is not a de Polignac number, because 1209952216101 - 2¹³ = 1209952207909 is a prime.

It is a super-4 number, since 4×1209952216101⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1209952216101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209952216103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10474690 + ... + 10589571.

It is an arithmetic number, because the mean of its divisors is an integer number (103509783468).

Almost surely, 2^{1209952216101} is an apocalyptic number.

It is an amenable number.

1209952216101 is a deficient number, since it is larger than the sum of its proper divisors (446204319387).

1209952216101 is a wasteful number, since it uses less digits than its factorization.

1209952216101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21064772.

The product of its (nonzero) digits is 19440, while the sum is 39.

The spelling of 1209952216101 in words is "one trillion, two hundred nine billion, nine hundred fifty-two million, two hundred sixteen thousand, one hundred one".