12211020987 has 32 divisors (see below), whose sum is σ = 17991383040. Its totient is φ = 7305112320.

The previous prime is 12211020971. The next prime is 12211021037. The reversal of 12211020987 is 78902011221.

It is not a de Polignac number, because 12211020987 - 2⁴ = 12211020971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12211025987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1914678 + ... + 1921044.

It is an arithmetic number, because the mean of its divisors is an integer number (562230720).

Almost surely, 2^12211020987 is an apocalyptic number.

12211020987 is a deficient number, since it is larger than the sum of its proper divisors (5780362053).

12211020987 is a wasteful number, since it uses less digits than its factorization.

12211020987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 12211020987 in words is "twelve billion, two hundred eleven million, twenty thousand, nine hundred eighty-seven".