1020212211111 has 64 divisors (see below), whose sum is σ = 1474632207360. Its totient is φ = 625703823360.

The previous prime is 1020212211107. The next prime is 1020212211133. The reversal of 1020212211111 is 1111122120201.

It is a happy number.

It is not a de Polignac number, because 1020212211111 - 2² = 1020212211107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020212211191) 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 63 ways as a sum of consecutive naturals, for example, 112217676 + ... + 112226766.

It is an arithmetic number, because the mean of its divisors is an integer number (23041128240).

Almost surely, 2^{1020212211111} is an apocalyptic number.

1020212211111 is a deficient number, since it is larger than the sum of its proper divisors (454419996249).

1020212211111 is a wasteful number, since it uses less digits than its factorization.

1020212211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656.

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

Adding to 1020212211111 its reverse (1111122120201), we get a palindrome (2131334331312).

It can be divided in two parts, 102021 and 2211111, that added together give a palindrome (2313132).

The spelling of 1020212211111 in words is "one trillion, twenty billion, two hundred twelve million, two hundred eleven thousand, one hundred eleven".