21011212132302 has 96 divisors (see below), whose sum is σ = 51014699769600. Its totient is φ = 5741506374912.

The previous prime is 21011212132289. The next prime is 21011212132319. The reversal of 21011212132302 is 20323121211012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57558774 + ... + 57922662.

It is an arithmetic number, because the mean of its divisors is an integer number (531403122600).

Almost surely, 2^{21011212132302} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21011212132302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25507349884800).

21011212132302 is an abundant number, since it is smaller than the sum of its proper divisors (30003487637298).

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

21011212132302 is a wasteful number, since it uses less digits than its factorization.

21011212132302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372470 (or 372463 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21011212132302 its reverse (20323121211012), we get a palindrome (41334333343314).

The spelling of 21011212132302 in words is "twenty-one trillion, eleven billion, two hundred twelve million, one hundred thirty-two thousand, three hundred two".