211421333331 has 16 divisors (see below), whose sum is σ = 337310389920. Its totient is φ = 130105435680.

The previous prime is 211421333303. The next prime is 211421333353. The reversal of 211421333331 is 133333124112.

211421333331 is a `hidden beast` number, since 2 + 114 + 213 + 3 + 3 + 331 = 666.

211421333331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211421333331 - 2¹⁰ = 211421332307 is a prime.

It is a super-2 number, since 2×211421333331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 211421333295 and 211421333304.

It is not an unprimeable number, because it can be changed into a prime (211421333371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301169640 + ... + 301170341.

It is an arithmetic number, because the mean of its divisors is an integer number (21081899370).

Almost surely, 2^211421333331 is an apocalyptic number.

211421333331 is a deficient number, since it is larger than the sum of its proper divisors (125889056589).

211421333331 is a wasteful number, since it uses less digits than its factorization.

211421333331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602340003 (or 602339997 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 211421333331 its reverse (133333124112), we get a palindrome (344754457443).

The spelling of 211421333331 in words is "two hundred eleven billion, four hundred twenty-one million, three hundred thirty-three thousand, three hundred thirty-one".