1210121112011 has 12 divisors (see below), whose sum is σ = 1393971161328. Its totient is φ = 1029079274832.

The previous prime is 1210121112007. The next prime is 1210121112029. The reversal of 1210121112011 is 1102111210121.

It is not a de Polignac number, because 1210121112011 - 2² = 1210121112007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210121142011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5246216 + ... + 5472021.

It is an arithmetic number, because the mean of its divisors is an integer number (116164263444).

Almost surely, 2^{1210121112011} is an apocalyptic number.

1210121112011 is a deficient number, since it is larger than the sum of its proper divisors (183850049317).

1210121112011 is an equidigital number, since it uses as much as digits as its factorization.

1210121112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10718498 (or 10718371 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1210121112011 its reverse (1102111210121), we get a palindrome (2312232322132).

The spelling of 1210121112011 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, one hundred twelve thousand, eleven".