210021022121011 has 32 divisors (see below), whose sum is σ = 227164592793600. Its totient is φ = 193517251384320.

The previous prime is 210021022120969. The next prime is 210021022121077. The reversal of 210021022121011 is 110121220120012.

It is a cyclic number.

It is not a de Polignac number, because 210021022121011 - 2²⁷ = 210020887903283 is a prime.

It is a super-2 number, since 2×210021022121011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021022161011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331823730 + ... + 332456056.

It is an arithmetic number, because the mean of its divisors is an integer number (7098893524800).

Almost surely, 2^{210021022121011} is an apocalyptic number.

210021022121011 is a deficient number, since it is larger than the sum of its proper divisors (17143570672589).

210021022121011 is a wasteful number, since it uses less digits than its factorization.

210021022121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633699.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210021022121011 its reverse (110121220120012), we get a palindrome (320142242241023).

The spelling of 210021022121011 in words is "two hundred ten trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, eleven".