121121220112012 has 24 divisors (see below), whose sum is σ = 212450324486400. Its totient is φ = 60421134364176.

The previous prime is 121121220112007. The next prime is 121121220112021. The reversal of 121121220112012 is 210211022121121.

It is a happy number.

It is a super-2 number, since 2×121121220112012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70413939 + ... + 72113557.

It is an arithmetic number, because the mean of its divisors is an integer number (8852096853600).

Almost surely, 2^{121121220112012} is an apocalyptic number.

It is an amenable number.

121121220112012 is a deficient number, since it is larger than the sum of its proper divisors (91329104374388).

121121220112012 is a wasteful number, since it uses less digits than its factorization.

121121220112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740645 (or 1740643 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121220112012 its reverse (210211022121121), we get a palindrome (331332242233133).

The spelling of 121121220112012 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twelve".