21011212132102 has 8 divisors (see below), whose sum is σ = 31516859411856. Its totient is φ = 10505592328152.

The previous prime is 21011212132063. The next prime is 21011212132103. The reversal of 21011212132102 is 20123121211012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21011212132102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011212132103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4836933 + ... + 8088160.

It is an arithmetic number, because the mean of its divisors is an integer number (3939607426482).

Almost surely, 2^{21011212132102} is an apocalyptic number.

21011212132102 is a deficient number, since it is larger than the sum of its proper divisors (10505647279754).

21011212132102 is a wasteful number, since it uses less digits than its factorization.

21011212132102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13737902.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21011212132102 its reverse (20123121211012), we get a palindrome (41134333343114).

The spelling of 21011212132102 in words is "twenty-one trillion, eleven billion, two hundred twelve million, one hundred thirty-two thousand, one hundred two".