121113222012 has 36 divisors (see below), whose sum is σ = 309178481976. Its totient is φ = 39971359200.

The previous prime is 121113222011. The next prime is 121113222017. The reversal of 121113222012 is 210222311121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×121113222012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121113222011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16651098 + ... + 16658369.

It is an arithmetic number, because the mean of its divisors is an integer number (8588291166).

Almost surely, 2^121113222012 is an apocalyptic number.

121113222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121113222012 is an abundant number, since it is smaller than the sum of its proper divisors (188065259964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121113222012 is a wasteful number, since it uses less digits than its factorization.

121113222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33309578 (or 33309573 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121113222012 its reverse (210222311121), we get a palindrome (331335533133).

The spelling of 121113222012 in words is "one hundred twenty-one billion, one hundred thirteen million, two hundred twenty-two thousand, twelve".