121012001 has 16 divisors (see below), whose sum is σ = 140133888. Its totient is φ = 103276800.

The previous prime is 121011997. The next prime is 121012013. The reversal of 121012001 is 100210121.

It is not a de Polignac number, because 121012001 - 2² = 121011997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121012001.

It is not an unprimeable number, because it can be changed into a prime (121012051) 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, 121616 + ... + 122606.

It is an arithmetic number, because the mean of its divisors is an integer number (8758368).

Almost surely, 2^121012001 is an apocalyptic number.

121012001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121012001 is a deficient number, since it is larger than the sum of its proper divisors (19121887).

121012001 is a wasteful number, since it uses less digits than its factorization.

121012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121012001 is about 11000.5454864748. The cubic root of 121012001 is about 494.6250958491.

Adding to 121012001 its reverse (100210121), we get a palindrome (221222122).

The spelling of 121012001 in words is "one hundred twenty-one million, twelve thousand, one".