1211023011211 has 8 divisors (see below), whose sum is σ = 1304571144240. Its totient is φ = 1117530952032.

The previous prime is 1211023011203. The next prime is 1211023011227. The reversal of 1211023011211 is 1121103201121.

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 1211023011211 - 2³ = 1211023011203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211023011241) 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, 13973596 + ... + 14059993.

It is an arithmetic number, because the mean of its divisors is an integer number (163071393030).

Almost surely, 2^{1211023011211} is an apocalyptic number.

1211023011211 is a deficient number, since it is larger than the sum of its proper divisors (93548133029).

1211023011211 is a wasteful number, since it uses less digits than its factorization.

1211023011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28036925.

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

Adding to 1211023011211 its reverse (1121103201121), we get a palindrome (2332126212332).

It can be divided in two parts, 121102 and 3011211, that added together give a palindrome (3132313).

The spelling of 1211023011211 in words is "one trillion, two hundred eleven billion, twenty-three million, eleven thousand, two hundred eleven".