20021212202111 has 8 divisors (see below), whose sum is σ = 20711780060400. Its totient is φ = 19330656425920.

The previous prime is 20021212202077. The next prime is 20021212202113. The reversal of 20021212202111 is 11120221212002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021212202111 - 2²² = 20021208007807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021212202111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212202113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417155 + ... + 6341643.

It is an arithmetic number, because the mean of its divisors is an integer number (2588972507550).

Almost surely, 2^{20021212202111} is an apocalyptic number.

20021212202111 is a deficient number, since it is larger than the sum of its proper divisors (690567858289).

20021212202111 is a wasteful number, since it uses less digits than its factorization.

20021212202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6041049.

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

Adding to 20021212202111 its reverse (11120221212002), we get a palindrome (31141433414113).

The spelling of 20021212202111 in words is "twenty trillion, twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred eleven".