21012101041212 has 36 divisors (see below), whose sum is σ = 53341878844800. Its totient is φ = 6973973447232.

The previous prime is 21012101041163. The next prime is 21012101041291. The reversal of 21012101041212 is 21214010121012.

21012101041212 is a `hidden beast` number, since 21 + 0 + 1 + 210 + 10 + 412 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21012101041212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252501212 + ... + 1252517987.

It is an arithmetic number, because the mean of its divisors is an integer number (1481718856800).

Almost surely, 2^{21012101041212} is an apocalyptic number.

It is an amenable number.

21012101041212 is an abundant number, since it is smaller than the sum of its proper divisors (32329777803588).

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

21012101041212 is a wasteful number, since it uses less digits than its factorization.

21012101041212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505019442 (or 2505019437 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21012101041212 its reverse (21214010121012), we get a palindrome (42226111162224).

The spelling of 21012101041212 in words is "twenty-one trillion, twelve billion, one hundred one million, forty-one thousand, two hundred twelve".