1201011211123 has 8 divisors (see below), whose sum is σ = 1248074006400. Its totient is φ = 1154468447040.

The previous prime is 1201011211111. The next prime is 1201011211187. The reversal of 1201011211123 is 3211121101021.

It is a happy number.

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 1201011211123 - 2⁵ = 1201011211091 is a prime.

It is a super-2 number, since 2×1201011211123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201011211097 and 1201011211106.

It is not an unprimeable number, because it can be changed into a prime (1201011211193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130003090 + ... + 130012327.

It is an arithmetic number, because the mean of its divisors is an integer number (156009250800).

Almost surely, 2^{1201011211123} is an apocalyptic number.

1201011211123 is a deficient number, since it is larger than the sum of its proper divisors (47062795277).

1201011211123 is a wasteful number, since it uses less digits than its factorization.

1201011211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260015597.

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

Adding to 1201011211123 its reverse (3211121101021), we get a palindrome (4412132312144).

The spelling of 1201011211123 in words is "one trillion, two hundred one billion, eleven million, two hundred eleven thousand, one hundred twenty-three".