111211012001 has 2 divisors, whose sum is σ = 111211012002. Its totient is φ = 111211012000.

The previous prime is 111211011979. The next prime is 111211012057. The reversal of 111211012001 is 100210112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95450720401 + 15760291600 = 308951^2 + 125540^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211012001 - 2²⁶ = 111143903137 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211012501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605506000 + 55605506001.

It is an arithmetic number, because the mean of its divisors is an integer number (55605506001).

Almost surely, 2^111211012001 is an apocalyptic number.

It is an amenable number.

111211012001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211012001 is an equidigital number, since it uses as much as digits as its factorization.

111211012001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111211012001 its reverse (100210112111), we get a palindrome (211421124112).

The spelling of 111211012001 in words is "one hundred eleven billion, two hundred eleven million, twelve thousand, one".