211011012112021 has 4 divisors (see below), whose sum is σ = 230193831394944. Its totient is φ = 191828192829100.

The previous prime is 211011012111937. The next prime is 211011012112037. The reversal of 211011012112021 is 120211210110112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211011012112021 - 2¹¹ = 211011012109973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211011012111986 and 211011012112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011012112081) 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, 9591409641445 + ... + 9591409641466.

It is an arithmetic number, because the mean of its divisors is an integer number (57548457848736).

Almost surely, 2^{211011012112021} is an apocalyptic number.

It is an amenable number.

211011012112021 is a deficient number, since it is larger than the sum of its proper divisors (19182819282923).

211011012112021 is a wasteful number, since it uses less digits than its factorization.

211011012112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19182819282922.

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

Adding to 211011012112021 its reverse (120211210110112), we get a palindrome (331222222222133).

The spelling of 211011012112021 in words is "two hundred eleven trillion, eleven billion, twelve million, one hundred twelve thousand, twenty-one".