211020222021 has 16 divisors (see below), whose sum is σ = 322888883328. Its totient is φ = 120082636800.

The previous prime is 211020221983. The next prime is 211020222031. The reversal of 211020222021 is 120222020112.

It is not a de Polignac number, because 211020222021 - 2²⁶ = 210953113157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020222031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20842620 + ... + 20852741.

It is an arithmetic number, because the mean of its divisors is an integer number (20180555208).

Almost surely, 2^211020222021 is an apocalyptic number.

211020222021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211020222021 is a deficient number, since it is larger than the sum of its proper divisors (111868661307).

211020222021 is a wasteful number, since it uses less digits than its factorization.

211020222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41695612.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 211020222021 its reverse (120222020112), we get a palindrome (331242242133).

The spelling of 211020222021 in words is "two hundred eleven billion, twenty million, two hundred twenty-two thousand, twenty-one".