20001212001111 has 8 divisors (see below), whose sum is σ = 29092672001664. Its totient is φ = 12121946667320.

The previous prime is 20001212001107. The next prime is 20001212001143. The reversal of 20001212001111 is 11110021210002.

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 20001212001111 - 2² = 20001212001107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001212001311) 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, 303048666651 + ... + 303048666716.

It is an arithmetic number, because the mean of its divisors is an integer number (3636584000208).

Almost surely, 2^{20001212001111} is an apocalyptic number.

20001212001111 is a deficient number, since it is larger than the sum of its proper divisors (9091460000553).

20001212001111 is a wasteful number, since it uses less digits than its factorization.

20001212001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606097333381.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001212001111 its reverse (11110021210002), we get a palindrome (31111233211113).

The spelling of 20001212001111 in words is "twenty trillion, one billion, two hundred twelve million, one thousand, one hundred eleven".