1211013221301 has 12 divisors (see below), whose sum is σ = 1883798344428. Its totient is φ = 745238905344.

The previous prime is 1211013221291. The next prime is 1211013221309. The reversal of 1211013221301 is 1031223101121.

1211013221301 is a `hidden beast` number, since 1 + 211 + 0 + 1 + 322 + 130 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 408098658276 + 802914563025 = 638826^2 + 896055^2 .

It is not a de Polignac number, because 1211013221301 - 2⁹ = 1211013220789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211013221309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5175270060 + ... + 5175270293.

It is an arithmetic number, because the mean of its divisors is an integer number (156983195369).

Almost surely, 2^{1211013221301} is an apocalyptic number.

It is an amenable number.

1211013221301 is a deficient number, since it is larger than the sum of its proper divisors (672785123127).

1211013221301 is a wasteful number, since it uses less digits than its factorization.

1211013221301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350540372 (or 10350540369 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211013221301 its reverse (1031223101121), we get a palindrome (2242236322422).

The spelling of 1211013221301 in words is "one trillion, two hundred eleven billion, thirteen million, two hundred twenty-one thousand, three hundred one".