20021212010111 has 12 divisors (see below), whose sum is σ = 21693265082352. Its totient is φ = 18469618142976.

The previous prime is 20021212010087. The next prime is 20021212010117. The reversal of 20021212010111 is 11101021212002.

It is a de Polignac number, because none of the positive numbers 2^k-20021212010111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212010117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36588626 + ... + 37131791.

It is an arithmetic number, because the mean of its divisors is an integer number (1807772090196).

Almost surely, 2^{20021212010111} is an apocalyptic number.

20021212010111 is a deficient number, since it is larger than the sum of its proper divisors (1672053072241).

20021212010111 is a wasteful number, since it uses less digits than its factorization.

20021212010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73722050 (or 73722037 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20021212010111 its reverse (11101021212002), we get a palindrome (31122233222113).

The spelling of 20021212010111 in words is "twenty trillion, twenty-one billion, two hundred twelve million, ten thousand, one hundred eleven".