1012111121211 has 16 divisors (see below), whose sum is σ = 1427444399616. Its totient is φ = 636563036736.

The previous prime is 1012111121167. The next prime is 1012111121213. The reversal of 1012111121211 is 1121211112101.

It is a de Polignac number, because none of the positive numbers 2^k-1012111121211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012111121213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100462615 + ... + 100472688.

It is an arithmetic number, because the mean of its divisors is an integer number (89215274976).

Almost surely, 2^{1012111121211} is an apocalyptic number.

1012111121211 is a deficient number, since it is larger than the sum of its proper divisors (415333278405).

1012111121211 is a wasteful number, since it uses less digits than its factorization.

1012111121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200935402.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1012111121211 its reverse (1121211112101), we get a palindrome (2133322233312).

The spelling of 1012111121211 in words is "one trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".