221111201001101 has 2 divisors, whose sum is σ = 221111201001102. Its totient is φ = 221111201001100.

The previous prime is 221111201001073. The next prime is 221111201001143. The reversal of 221111201001101 is 101100102111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184426992552100 + 36684208449001 = 13580390^2 + 6056749^2 .

It is a cyclic number.

It is not a de Polignac number, because 221111201001101 - 2³⁰ = 221110127259277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111201001701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555600500550 + 110555600500551.

It is an arithmetic number, because the mean of its divisors is an integer number (110555600500551).

Almost surely, 2^{221111201001101} is an apocalyptic number.

It is an amenable number.

221111201001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111201001101 is an equidigital number, since it uses as much as digits as its factorization.

221111201001101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221111201001101 its reverse (101100102111122), we get a palindrome (322211303112223).

The spelling of 221111201001101 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one thousand, one hundred one".