21011111014201 has 16 divisors (see below), whose sum is σ = 26195941173888. Its totient is φ = 16372125360000.

The previous prime is 21011111014183. The next prime is 21011111014211. The reversal of 21011111014201 is 10241011111012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21011111014201 - 2⁹ = 21011111013689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011111014211) 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, 6381021 + ... + 9096133.

It is an arithmetic number, because the mean of its divisors is an integer number (1637246323368).

Almost surely, 2^{21011111014201} is an apocalyptic number.

It is an amenable number.

21011111014201 is a deficient number, since it is larger than the sum of its proper divisors (5184830159687).

21011111014201 is a wasteful number, since it uses less digits than its factorization.

21011111014201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815632.

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

Adding to 21011111014201 its reverse (10241011111012), we get a palindrome (31252122125213).

The spelling of 21011111014201 in words is "twenty-one trillion, eleven billion, one hundred eleven million, fourteen thousand, two hundred one".