121320012 has 48 divisors (see below), whose sum is σ = 309480192. Its totient is φ = 36684480.

The previous prime is 121320011. The next prime is 121320029. The reversal of 121320012 is 210023121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 121320012.

It is not an unprimeable number, because it can be changed into a prime (121320011) 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, 97458 + ... + 98694.

It is an arithmetic number, because the mean of its divisors is an integer number (6447504).

Almost surely, 2^121320012 is an apocalyptic number.

121320012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121320012 is an abundant number, since it is smaller than the sum of its proper divisors (188160180).

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

121320012 is a wasteful number, since it uses less digits than its factorization.

121320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121320012 is about 11014.5363951462. The cubic root of 121320012 is about 495.0443955692.

Adding to 121320012 its reverse (210023121), we get a palindrome (331343133).

The spelling of 121320012 in words is "one hundred twenty-one million, three hundred twenty thousand, twelve".