21211223003331 has 16 divisors (see below), whose sum is σ = 28299746970624. Its totient is φ = 14131757824704.

The previous prime is 21211223003297. The next prime is 21211223003357. The reversal of 21211223003331 is 13330032211212.

It is not a de Polignac number, because 21211223003331 - 2⁹ = 21211223002819 is a prime.

It is a super-2 number, since 2×21211223003331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211223083331) 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, 171651490 + ... + 171775016.

It is an arithmetic number, because the mean of its divisors is an integer number (1768734185664).

Almost surely, 2^{21211223003331} is an apocalyptic number.

21211223003331 is a deficient number, since it is larger than the sum of its proper divisors (7088523967293).

21211223003331 is a wasteful number, since it uses less digits than its factorization.

21211223003331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159730.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21211223003331 its reverse (13330032211212), we get a palindrome (34541255214543).

The spelling of 21211223003331 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-three million, three thousand, three hundred thirty-one".