21311411223420 has 36 divisors (see below), whose sum is σ = 64644614044920. Its totient is φ = 5683042992864.

The previous prime is 21311411223383. The next prime is 21311411223437. The reversal of 21311411223420 is 2432211411312.

21311411223420 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 1 + 4 + 11 + 223 + 420 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59198364330 + ... + 59198364689.

It is an arithmetic number, because the mean of its divisors is an integer number (1795683723470).

Almost surely, 2^{21311411223420} is an apocalyptic number.

21311411223420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311411223420 is an abundant number, since it is smaller than the sum of its proper divisors (43333202821500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311411223420 is a wasteful number, since it uses less digits than its factorization.

21311411223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118396729034 (or 118396729029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21311411223420 its reverse (2432211411312), we get a palindrome (23743622634732).

The spelling of 21311411223420 in words is "twenty-one trillion, three hundred eleven billion, four hundred eleven million, two hundred twenty-three thousand, four hundred twenty".