121121001006 has 16 divisors (see below), whose sum is σ = 242283474048. Its totient is φ = 40366755000.

The previous prime is 121121000993. The next prime is 121121001007. The reversal of 121121001006 is 600100121121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121001007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689970 + ... + 1760181.

It is an arithmetic number, because the mean of its divisors is an integer number (15142717128).

Almost surely, 2^121121001006 is an apocalyptic number.

121121001006 is an abundant number, since it is smaller than the sum of its proper divisors (121162473042).

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

121121001006 is a wasteful number, since it uses less digits than its factorization.

121121001006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456007.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121121001006 its reverse (600100121121), we get a palindrome (721221122127).

The spelling of 121121001006 in words is "one hundred twenty-one billion, one hundred twenty-one million, one thousand, six".