21101201212012 has 12 divisors (see below), whose sum is σ = 36947812790896. Its totient is φ = 10544683271760.

The previous prime is 21101201212009. The next prime is 21101201212019. The reversal of 21101201212012 is 21021210210112.

It is not an unprimeable number, because it can be changed into a prime (21101201212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479325539 + ... + 1479339802.

Almost surely, 2^{21101201212012} is an apocalyptic number.

It is an amenable number.

21101201212012 is a deficient number, since it is larger than the sum of its proper divisors (15846611578884).

21101201212012 is a wasteful number, since it uses less digits than its factorization.

21101201212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958667128 (or 2958667126 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101201212012 its reverse (21021210210112), we get a palindrome (42122411422124).

The spelling of 21101201212012 in words is "twenty-one trillion, one hundred one billion, two hundred one million, two hundred twelve thousand, twelve".