21012101221112 has 8 divisors (see below), whose sum is σ = 39397689789600. Its totient is φ = 10506050610552.

The previous prime is 21012101221093. The next prime is 21012101221127. The reversal of 21012101221112 is 21112210121012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313256326312 + ... + 1313256326327.

It is an arithmetic number, because the mean of its divisors is an integer number (4924711223700).

Almost surely, 2^{21012101221112} is an apocalyptic number.

It is an amenable number.

21012101221112 is a deficient number, since it is larger than the sum of its proper divisors (18385588568488).

21012101221112 is a wasteful number, since it uses less digits than its factorization.

21012101221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626512652645 (or 2626512652641 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21012101221112 its reverse (21112210121012), we get a palindrome (42124311342124).

The spelling of 21012101221112 in words is "twenty-one trillion, twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred twelve".