20021212020111 has 4 divisors (see below), whose sum is σ = 26694949360152. Its totient is φ = 13347474680072.

The previous prime is 20021212020071. The next prime is 20021212020143. The reversal of 20021212020111 is 11102021212002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20021212020111 - 2⁷ = 20021212019983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212120111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336868670016 + ... + 3336868670021.

It is an arithmetic number, because the mean of its divisors is an integer number (6673737340038).

Almost surely, 2^{20021212020111} is an apocalyptic number.

20021212020111 is a deficient number, since it is larger than the sum of its proper divisors (6673737340041).

20021212020111 is an equidigital number, since it uses as much as digits as its factorization.

20021212020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673737340040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021212020111 its reverse (11102021212002), we get a palindrome (31123233232113).

The spelling of 20021212020111 in words is "twenty trillion, twenty-one billion, two hundred twelve million, twenty thousand, one hundred eleven".