21152361220140 has 24 divisors (see below), whose sum is σ = 59226611416560. Its totient is φ = 5640629658688.

The previous prime is 21152361220129. The next prime is 21152361220153. The reversal of 21152361220140 is 4102216325112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21152361220098 and 21152361220107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176269676775 + ... + 176269676894.

It is an arithmetic number, because the mean of its divisors is an integer number (2467775475690).

Almost surely, 2^{21152361220140} is an apocalyptic number.

21152361220140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152361220140 is an abundant number, since it is smaller than the sum of its proper divisors (38074250196420).

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

21152361220140 is a wasteful number, since it uses less digits than its factorization.

21152361220140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352539353681 (or 352539353679 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21152361220140 its reverse (4102216325112), we get a palindrome (25254577545252).

The spelling of 21152361220140 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred sixty-one million, two hundred twenty thousand, one hundred forty".