121030111312 has 80 divisors (see below), whose sum is σ = 257365652544. Its totient is φ = 54680832000.

The previous prime is 121030111303. The next prime is 121030111313. The reversal of 121030111312 is 213111030121.

It is a happy number.

It is a super-2 number, since 2×121030111312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121030111313) 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, 24895762 + ... + 24900622.

Almost surely, 2^121030111312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121030111312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128682826272).

121030111312 is an abundant number, since it is smaller than the sum of its proper divisors (136335541232).

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

121030111312 is a wasteful number, since it uses less digits than its factorization.

121030111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708 (or 5702 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121030111312 its reverse (213111030121), we get a palindrome (334141141433).

The spelling of 121030111312 in words is "one hundred twenty-one billion, thirty million, one hundred eleven thousand, three hundred twelve".