121020012 has 18 divisors (see below), whose sum is σ = 305911788. Its totient is φ = 40339992.

The previous prime is 121019999. The next prime is 121020019. The reversal of 121020012 is 210020121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121019976 and 121020003.

It is not an unprimeable number, because it can be changed into a prime (121020019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1680798 + ... + 1680869.

Almost surely, 2^121020012 is an apocalyptic number.

121020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121020012 is an abundant number, since it is smaller than the sum of its proper divisors (184891776).

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

121020012 is a wasteful number, since it uses less digits than its factorization.

121020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361677 (or 3361672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121020012 is about 11000.9095987559. The cubic root of 121020012 is about 494.6360103430.

Adding to 121020012 its reverse (210020121), we get a palindrome (331040133).

The spelling of 121020012 in words is "one hundred twenty-one million, twenty thousand, twelve".