1211000021211 has 32 divisors (see below), whose sum is σ = 1683002377728. Its totient is φ = 773898693120.

The previous prime is 1211000021207. The next prime is 1211000021221. The reversal of 1211000021211 is 1121200001121.

It is not a de Polignac number, because 1211000021211 - 2² = 1211000021207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211000021221) 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 31 ways as a sum of consecutive naturals, for example, 1805616 + ... + 2383746.

It is an arithmetic number, because the mean of its divisors is an integer number (52593824304).

Almost surely, 2^{1211000021211} is an apocalyptic number.

1211000021211 is a deficient number, since it is larger than the sum of its proper divisors (472002356517).

1211000021211 is a wasteful number, since it uses less digits than its factorization.

1211000021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578451.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211000021211 its reverse (1121200001121), we get a palindrome (2332200022332).

The spelling of 1211000021211 in words is "one trillion, two hundred eleven billion, twenty-one thousand, two hundred eleven".