20021100001111 has 16 divisors (see below), whose sum is σ = 22595650882560. Its totient is φ = 17572363492320.

The previous prime is 20021100001037. The next prime is 20021100001127. The reversal of 20021100001111 is 11110000112002.

It is a cyclic number.

It is not a de Polignac number, because 20021100001111 - 2¹³ = 20021099992919 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 (20021100001211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3739906 + ... + 7350448.

It is an arithmetic number, because the mean of its divisors is an integer number (1412228180160).

Almost surely, 2^{20021100001111} is an apocalyptic number.

20021100001111 is a deficient number, since it is larger than the sum of its proper divisors (2574550881449).

20021100001111 is a wasteful number, since it uses less digits than its factorization.

20021100001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627966.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20021100001111 its reverse (11110000112002), we get a palindrome (31131100113113).

The spelling of 20021100001111 in words is "twenty trillion, twenty-one billion, one hundred million, one thousand, one hundred eleven".