21221040153040 has 160 divisors (see below), whose sum is σ = 63920866302720. Its totient is φ = 6362629926912.

The previous prime is 21221040153037. The next prime is 21221040153043. The reversal of 21221040153040 is 4035104012212.

It is an interprime number because it is at equal distance from previous prime (21221040153037) and next prime (21221040153043).

It is a junction number, because it is equal to n+sod(n) for n = 21221040152996 and 21221040153014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221040153043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76571629 + ... + 76848268.

It is an arithmetic number, because the mean of its divisors is an integer number (399505414392).

Almost surely, 2^{21221040153040} is an apocalyptic number.

21221040153040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221040153040 is an abundant number, since it is smaller than the sum of its proper divisors (42699826149680).

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

21221040153040 is a wasteful number, since it uses less digits than its factorization.

21221040153040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153419949 (or 153419943 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21221040153040 its reverse (4035104012212), we get a palindrome (25256144165252).

The spelling of 21221040153040 in words is "twenty-one trillion, two hundred twenty-one billion, forty million, one hundred fifty-three thousand, forty".