21143012243132 has 12 divisors (see below), whose sum is σ = 39846446150616. Its totient is φ = 9758313342960.

The previous prime is 21143012243113. The next prime is 21143012243191. The reversal of 21143012243132 is 23134221034112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21143012243095 and 21143012243104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203298194594 + ... + 203298194697.

It is an arithmetic number, because the mean of its divisors is an integer number (3320537179218).

Almost surely, 2^{21143012243132} is an apocalyptic number.

It is an amenable number.

21143012243132 is a deficient number, since it is larger than the sum of its proper divisors (18703433907484).

21143012243132 is a wasteful number, since it uses less digits than its factorization.

21143012243132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406596389308 (or 406596389306 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21143012243132 its reverse (23134221034112), we get a palindrome (44277233277244).

The spelling of 21143012243132 in words is "twenty-one trillion, one hundred forty-three billion, twelve million, two hundred forty-three thousand, one hundred thirty-two".