211122020021 has 8 divisors (see below), whose sum is σ = 230426272800. Its totient is φ = 191836324240.

The previous prime is 211122019993. The next prime is 211122020027. The reversal of 211122020021 is 120020221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211122020021 - 2²² = 211117825717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211122019978 and 211122020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122020027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4615451 + ... + 4660968.

It is an arithmetic number, because the mean of its divisors is an integer number (28803284100).

Almost surely, 2^211122020021 is an apocalyptic number.

It is an amenable number.

211122020021 is a deficient number, since it is larger than the sum of its proper divisors (19304252779).

211122020021 is a wasteful number, since it uses less digits than its factorization.

211122020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9278499.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211122020021 its reverse (120020221112), we get a palindrome (331142241133).

The spelling of 211122020021 in words is "two hundred eleven billion, one hundred twenty-two million, twenty thousand, twenty-one".