1301210121211 has 16 divisors (see below), whose sum is σ = 1747079324928. Its totient is φ = 935935351200.

The previous prime is 1301210121203. The next prime is 1301210121241. The reversal of 1301210121211 is 1121210121031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1301210121211 - 2³ = 1301210121203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1301210121241) 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, 649954105 + ... + 649956106.

It is an arithmetic number, because the mean of its divisors is an integer number (109192457808).

Almost surely, 2^{1301210121211} is an apocalyptic number.

1301210121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1301210121211 is a deficient number, since it is larger than the sum of its proper divisors (445869203717).

1301210121211 is a wasteful number, since it uses less digits than its factorization.

1301210121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299910242.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1301210121211 its reverse (1121210121031), we get a palindrome (2422420242242).

The spelling of 1301210121211 in words is "one trillion, three hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".