1121212121211 has 144 divisors (see below), whose sum is σ = 2069086114368. Its totient is φ = 569669760000.

The previous prime is 1121212121191. The next prime is 1121212121257.

It is a happy number.

1121212121211 is a `hidden beast` number, since 1 + 121 + 212 + 121 + 211 = 666.

1121212121211 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1121212121211 - 2⁶ = 1121212121147 is a prime.

It is a super-2 number, since 2×1121212121211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121212121311) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 113237361 + ... + 113247261.

It is an arithmetic number, because the mean of its divisors is an integer number (14368653572).

Almost surely, 2^{1121212121211} is an apocalyptic number.

1121212121211 is a deficient number, since it is larger than the sum of its proper divisors (947873993157).

1121212121211 is a wasteful number, since it uses less digits than its factorization.

1121212121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102 (or 10062 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

The spelling of 1121212121211 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".