211102021121 has 8 divisors (see below), whose sum is σ = 213323824488. Its totient is φ = 208882800000.

The previous prime is 211102021079. The next prime is 211102021187. The reversal of 211102021121 is 121120201112.

It can be written as a sum of positive squares in 4 ways, for example, as 101276061121 + 109825960000 = 318239^2 + 331400^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211102021121 - 2⁶ = 211102021057 is a prime.

It is a super-2 number, since 2×211102021121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211102021096 and 211102021105.

It is not an unprimeable number, because it can be changed into a prime (211102021721) 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, 480980 + ... + 808421.

It is an arithmetic number, because the mean of its divisors is an integer number (26665478061).

Almost surely, 2^211102021121 is an apocalyptic number.

It is an amenable number.

211102021121 is a deficient number, since it is larger than the sum of its proper divisors (2221803367).

211102021121 is a wasteful number, since it uses less digits than its factorization.

211102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291123.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211102021121 its reverse (121120201112), we get a palindrome (332222222233).

The spelling of 211102021121 in words is "two hundred eleven billion, one hundred two million, twenty-one thousand, one hundred twenty-one".