211323133021 has 64 divisors (see below), whose sum is σ = 298889902080. Its totient is φ = 143893635840.

The previous prime is 211323133019. The next prime is 211323133051. The reversal of 211323133021 is 120331323112.

It is a cyclic number.

It is not a de Polignac number, because 211323133021 - 2¹ = 211323133019 is a prime.

It is a super-2 number, since 2×211323133021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211323132983 and 211323133001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211323133051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32195886 + ... + 32202448.

It is an arithmetic number, because the mean of its divisors is an integer number (4670154720).

Almost surely, 2^211323133021 is an apocalyptic number.

It is an amenable number.

211323133021 is a deficient number, since it is larger than the sum of its proper divisors (87566769059).

211323133021 is a wasteful number, since it uses less digits than its factorization.

211323133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8306.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211323133021 its reverse (120331323112), we get a palindrome (331654456133).

The spelling of 211323133021 in words is "two hundred eleven billion, three hundred twenty-three million, one hundred thirty-three thousand, twenty-one".