113121120212 has 6 divisors (see below), whose sum is σ = 197961960378. Its totient is φ = 56560560104.

The previous prime is 113121120199. The next prime is 113121120221. The reversal of 113121120212 is 212021121311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66928794436 + 46192325776 = 258706^2 + 214924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14140140023 + ... + 14140140030.

It is an arithmetic number, because the mean of its divisors is an integer number (32993660063).

Almost surely, 2^113121120212 is an apocalyptic number.

It is an amenable number.

113121120212 is a deficient number, since it is larger than the sum of its proper divisors (84840840166).

113121120212 is a wasteful number, since it uses less digits than its factorization.

113121120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28280280057 (or 28280280055 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 113121120212 its reverse (212021121311), we get a palindrome (325142241523).

The spelling of 113121120212 in words is "one hundred thirteen billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twelve".