121020121001 has 16 divisors (see below), whose sum is σ = 136154457600. Its totient is φ = 106804776960.

The previous prime is 121020120989. The next prime is 121020121003. The reversal of 121020121001 is 100121020121.

It is a cyclic number.

It is not a de Polignac number, because 121020121001 - 2¹⁸ = 121019858857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020121003) 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, 1775576 + ... + 1842473.

It is an arithmetic number, because the mean of its divisors is an integer number (8509653600).

Almost surely, 2^121020121001 is an apocalyptic number.

It is an amenable number.

121020121001 is a deficient number, since it is larger than the sum of its proper divisors (15134336599).

121020121001 is a wasteful number, since it uses less digits than its factorization.

121020121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618176.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121020121001 its reverse (100121020121), we get a palindrome (221141141122).

The spelling of 121020121001 in words is "one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, one".