1211012112203 has 4 divisors (see below), whose sum is σ = 1211014469280. Its totient is φ = 1211009755128.

The previous prime is 1211012112181. The next prime is 1211012112209. The reversal of 1211012112203 is 3022112101121.

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 1211012112203 - 2⁶ = 1211012112139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211012112209) 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, 43475 + ... + 1556892.

It is an arithmetic number, because the mean of its divisors is an integer number (302753617320).

Almost surely, 2^{1211012112203} is an apocalyptic number.

1211012112203 is a deficient number, since it is larger than the sum of its proper divisors (2357077).

1211012112203 is an equidigital number, since it uses as much as digits as its factorization.

1211012112203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357076.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211012112203 its reverse (3022112101121), we get a palindrome (4233124213324).

The spelling of 1211012112203 in words is "one trillion, two hundred eleven billion, twelve million, one hundred twelve thousand, two hundred three".