1121212202121 has 48 divisors (see below), whose sum is σ = 1785232792512. Its totient is φ = 672452928000.

The previous prime is 1121212202119. The next prime is 1121212202161. The reversal of 1121212202121 is 1212022121211.

1121212202121 is a `hidden beast` number, since 112 + 121 + 220 + 212 + 1 = 666.

It is not a de Polignac number, because 1121212202121 - 2¹ = 1121212202119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121212202094 and 1121212202103.

It is not an unprimeable number, because it can be changed into a prime (1121212202161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3610821 + ... + 3909021.

It is an arithmetic number, because the mean of its divisors is an integer number (37192349844).

Almost surely, 2^{1121212202121} is an apocalyptic number.

1121212202121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121212202121 is a deficient number, since it is larger than the sum of its proper divisors (664020590391).

1121212202121 is a wasteful number, since it uses less digits than its factorization.

1121212202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298614 (or 298611 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121212202121 its reverse (1212022121211), we get a palindrome (2333234323332).

The spelling of 1121212202121 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".