121012011001001 has 16 divisors (see below), whose sum is σ = 128575746710400. Its totient is φ = 113568169799808.

The previous prime is 121012011000983. The next prime is 121012011001009. The reversal of 121012011001001 is 100100110210121.

It is a cyclic number.

It is not a de Polignac number, because 121012011001001 - 2¹⁰ = 121012010999977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012011001009) 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, 4306796 + ... + 16142258.

It is an arithmetic number, because the mean of its divisors is an integer number (8035984169400).

Almost surely, 2^{121012011001001} is an apocalyptic number.

It is an amenable number.

121012011001001 is a deficient number, since it is larger than the sum of its proper divisors (7563735709399).

121012011001001 is a wasteful number, since it uses less digits than its factorization.

121012011001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11840528.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121012011001001 its reverse (100100110210121), we get a palindrome (221112121211122).

The spelling of 121012011001001 in words is "one hundred twenty-one trillion, twelve billion, eleven million, one thousand, one".