1020211211211 has 16 divisors (see below), whose sum is σ = 1366746151680. Its totient is φ = 676915241120.

The previous prime is 1020211211207. The next prime is 1020211211221. The reversal of 1020211211211 is 1121121120201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020211211211 - 2² = 1020211211207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020211211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228021 + ... + 1446518.

It is an arithmetic number, because the mean of its divisors is an integer number (85421634480).

Almost surely, 2^{1020211211211} is an apocalyptic number.

1020211211211 is a deficient number, since it is larger than the sum of its proper divisors (346534940469).

1020211211211 is a wasteful number, since it uses less digits than its factorization.

1020211211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675506.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1020211211211 its reverse (1121121120201), we get a palindrome (2141332331412).

The spelling of 1020211211211 in words is "one trillion, twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".