1211121320101 has 8 divisors (see below), whose sum is σ = 1509969438144. Its totient is φ = 943730898720.

The previous prime is 1211121320083. The next prime is 1211121320119. The reversal of 1211121320101 is 1010231211121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211121320083) and next prime (1211121320119).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211121320101 - 2⁹ = 1211121319589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211121320191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7864424080 + ... + 7864424233.

It is an arithmetic number, because the mean of its divisors is an integer number (188746179768).

Almost surely, 2^{1211121320101} is an apocalyptic number.

1211121320101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211121320101 is a deficient number, since it is larger than the sum of its proper divisors (298848118043).

1211121320101 is a wasteful number, since it uses less digits than its factorization.

1211121320101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15728848331.

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

Adding to 1211121320101 its reverse (1010231211121), we get a palindrome (2221352531222).

The spelling of 1211121320101 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, three hundred twenty thousand, one hundred one".