111211201020001 has 16 divisors (see below), whose sum is σ = 116699081119488. Its totient is φ = 105869431958400.

The previous prime is 111211201019969. The next prime is 111211201020071. The reversal of 111211201020001 is 100020102112111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111211201020001 - 2⁵ = 111211201019969 is a prime.

It is a super-2 number, since 2×111211201020001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211201020071) 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, 86540550 + ... + 87816223.

It is an arithmetic number, because the mean of its divisors is an integer number (7293692569968).

Almost surely, 2^{111211201020001} is an apocalyptic number.

It is an amenable number.

111211201020001 is a deficient number, since it is larger than the sum of its proper divisors (5487880099487).

111211201020001 is a wasteful number, since it uses less digits than its factorization.

111211201020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174357192.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111211201020001 its reverse (100020102112111), we get a palindrome (211231303132112).

The spelling of 111211201020001 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred one million, twenty thousand, one".