1101221011201 has 2 divisors, whose sum is σ = 1101221011202. Its totient is φ = 1101221011200.

The previous prime is 1101221011199. The next prime is 1101221011217. The reversal of 1101221011201 is 1021101221011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625087890625 + 476133120576 = 790625^2 + 690024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221011201 - 2¹ = 1101221011199 is a prime.

Together with 1101221011199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1101221011801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610505600 + 550610505601.

It is an arithmetic number, because the mean of its divisors is an integer number (550610505601).

Almost surely, 2^{1101221011201} is an apocalyptic number.

It is an amenable number.

1101221011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221011201 is an equidigital number, since it uses as much as digits as its factorization.

1101221011201 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 13.

Adding to 1101221011201 its reverse (1021101221011), we get a palindrome (2122322232212).

The spelling of 1101221011201 in words is "one trillion, one hundred one billion, two hundred twenty-one million, eleven thousand, two hundred one".