11211220219985 has 8 divisors (see below), whose sum is σ = 13455549787776. Its totient is φ = 8967585826800.

The previous prime is 11211220219939. The next prime is 11211220219987. The reversal of 11211220219985 is 58991202211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11211220219985 - 2¹⁸ = 11211219957841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211220219987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173758169 + ... + 173822678.

It is an arithmetic number, because the mean of its divisors is an integer number (1681943723472).

Almost surely, 2^{11211220219985} is an apocalyptic number.

It is an amenable number.

11211220219985 is a deficient number, since it is larger than the sum of its proper divisors (2244329567791).

11211220219985 is an equidigital number, since it uses as much as digits as its factorization.

11211220219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347587303.

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 11211220219985 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred nineteen thousand, nine hundred eighty-five".