21152206332140 has 48 divisors (see below), whose sum is σ = 49129407328512. Its totient is φ = 7598963102976.

The previous prime is 21152206332133. The next prime is 21152206332211. The reversal of 21152206332140 is 4123360225112.

It is a junction number, because it is equal to n+sod(n) for n = 21152206332097 and 21152206332106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099377404 + ... + 1099396643.

It is an arithmetic number, because the mean of its divisors is an integer number (1023529319344).

Almost surely, 2^{21152206332140} is an apocalyptic number.

21152206332140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152206332140 is an abundant number, since it is smaller than the sum of its proper divisors (27977200996372).

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

21152206332140 is a wasteful number, since it uses less digits than its factorization.

21152206332140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198774106 (or 2198774104 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21152206332140 its reverse (4123360225112), we get a palindrome (25275566557252).

The spelling of 21152206332140 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred six million, three hundred thirty-two thousand, one hundred forty".