211210022121011 has 4 divisors (see below), whose sum is σ = 216361486075224. Its totient is φ = 206058558166800.

The previous prime is 211210022120963. The next prime is 211210022121019. The reversal of 211210022121011 is 110121220012112.

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 211210022121011 - 2⁴² = 206811975609907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211210022121019) 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, 2575731977045 + ... + 2575731977126.

It is an arithmetic number, because the mean of its divisors is an integer number (54090371518806).

Almost surely, 2^{211210022121011} is an apocalyptic number.

211210022121011 is a deficient number, since it is larger than the sum of its proper divisors (5151463954213).

211210022121011 is an equidigital number, since it uses as much as digits as its factorization.

211210022121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151463954212.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211210022121011 its reverse (110121220012112), we get a palindrome (321331242133123).

The spelling of 211210022121011 in words is "two hundred eleven trillion, two hundred ten billion, twenty-two million, one hundred twenty-one thousand, eleven".