1211012232211 has 4 divisors (see below), whose sum is σ = 1218441755272. Its totient is φ = 1203582709152.

The previous prime is 1211012232197. The next prime is 1211012232281. The reversal of 1211012232211 is 1122322101121.

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 1211012232211 - 2⁷ = 1211012232083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211012232281) 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, 3714761286 + ... + 3714761611.

It is an arithmetic number, because the mean of its divisors is an integer number (304610438818).

Almost surely, 2^{1211012232211} is an apocalyptic number.

1211012232211 is a deficient number, since it is larger than the sum of its proper divisors (7429523061).

1211012232211 is an equidigital number, since it uses as much as digits as its factorization.

1211012232211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7429523060.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211012232211 its reverse (1122322101121), we get a palindrome (2333334333332).

The spelling of 1211012232211 in words is "one trillion, two hundred eleven billion, twelve million, two hundred thirty-two thousand, two hundred eleven".