212021211011 has 4 divisors (see below), whose sum is σ = 214120431024. Its totient is φ = 209921991000.

The previous prime is 212021210953. The next prime is 212021211019. The reversal of 212021211011 is 110112120212.

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

It is a cyclic number.

It is not a de Polignac number, because 212021211011 - 2¹⁰ = 212021209987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021211019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049609855 + ... + 1049610056.

It is an arithmetic number, because the mean of its divisors is an integer number (53530107756).

Almost surely, 2^212021211011 is an apocalyptic number.

212021211011 is a deficient number, since it is larger than the sum of its proper divisors (2099220013).

212021211011 is a wasteful number, since it uses less digits than its factorization.

212021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099220012.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212021211011 its reverse (110112120212), we get a palindrome (322133331223).

It can be divided in two parts, 2120212 and 11011, that multiplied together give a palindrome (23345654332).

The spelling of 212021211011 in words is "two hundred twelve billion, twenty-one million, two hundred eleven thousand, eleven".