10220211211985 has 4 divisors (see below), whose sum is σ = 12264253454388. Its totient is φ = 8176168969584.

The previous prime is 10220211211979. The next prime is 10220211211999. The reversal of 10220211211985 is 58911211202201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7139119079569 + 3081092132416 = 2671913^2 + 1755304^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220211211985 - 2⁸ = 10220211211729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022021121194 + ... + 1022021121203.

It is an arithmetic number, because the mean of its divisors is an integer number (3066063363597).

Almost surely, 2^{10220211211985} is an apocalyptic number.

It is an amenable number.

10220211211985 is a deficient number, since it is larger than the sum of its proper divisors (2044042242403).

10220211211985 is an equidigital number, since it uses as much as digits as its factorization.

10220211211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044042242402.

The product of its (nonzero) digits is 5760, while the sum is 35.

The spelling of 10220211211985 in words is "ten trillion, two hundred twenty billion, two hundred eleven million, two hundred eleven thousand, nine hundred eighty-five".