21202012012112 has 40 divisors (see below), whose sum is σ = 41164601788680. Its totient is φ = 10578894036480.

The previous prime is 21202012012061. The next prime is 21202012012133. The reversal of 21202012012112 is 21121021020212.

It can be written as a sum of positive squares in 4 ways, for example, as 5844673715776 + 15357338296336 = 2417576^2 + 3918844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68752538 + ... + 69060230.

It is an arithmetic number, because the mean of its divisors is an integer number (1029115044717).

Almost surely, 2^{21202012012112} is an apocalyptic number.

It is an amenable number.

21202012012112 is a deficient number, since it is larger than the sum of its proper divisors (19962589776568).

21202012012112 is a wasteful number, since it uses less digits than its factorization.

21202012012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316671 (or 316665 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202012012112 its reverse (21121021020212), we get a palindrome (42323033032324).

The spelling of 21202012012112 in words is "twenty-one trillion, two hundred two billion, twelve million, twelve thousand, one hundred twelve".