1201012101211 has 4 divisors (see below), whose sum is σ = 1293397647472. Its totient is φ = 1108626554952.

The previous prime is 1201012101209. The next prime is 1201012101221. The reversal of 1201012101211 is 1121012101021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201012101211 - 2¹ = 1201012101209 is a prime.

It is a super-2 number, since 2×1201012101211² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 92385546247 = 1201012101211 / (1 + 2 + 0 + 1 + 0 + 1 + 2 + 1 + 0 + 1 + 2 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201012101191 and 1201012101200.

It is not an unprimeable number, because it can be changed into a prime (1201012101221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46192773111 + ... + 46192773136.

It is an arithmetic number, because the mean of its divisors is an integer number (323349411868).

Almost surely, 2^{1201012101211} is an apocalyptic number.

1201012101211 is a deficient number, since it is larger than the sum of its proper divisors (92385546261).

1201012101211 is an equidigital number, since it uses as much as digits as its factorization.

1201012101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92385546260.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201012101211 its reverse (1121012101021), we get a palindrome (2322024202232).

The spelling of 1201012101211 in words is "one trillion, two hundred one billion, twelve million, one hundred one thousand, two hundred eleven".