1212101121 has 16 divisors (see below), whose sum is σ = 2014921728. Its totient is φ = 629662800.

The previous prime is 1212101119. The next prime is 1212101131. The reversal of 1212101121 is 1211012121.

It is not a de Polignac number, because 1212101121 - 2¹ = 1212101119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212101097 and 1212101106.

It is not an unprimeable number, because it can be changed into a prime (1212101131) 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, 2623365 + ... + 2623826.

It is an arithmetic number, because the mean of its divisors is an integer number (125932608).

Almost surely, 2^1212101121 is an apocalyptic number.

1212101121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212101121 is a deficient number, since it is larger than the sum of its proper divisors (802820607).

1212101121 is a wasteful number, since it uses less digits than its factorization.

1212101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247212.

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

The square root of 1212101121 is about 34815.2426531828. The cubic root of 1212101121 is about 1066.2186732760.

Adding to 1212101121 its reverse (1211012121), we get a palindrome (2423113242).

The spelling of 1212101121 in words is "one billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".