121002010001 has 2 divisors, whose sum is σ = 121002010002. Its totient is φ = 121002010000.

The previous prime is 121002009967. The next prime is 121002010009. The reversal of 121002010001 is 100010200121.

It is an a-pointer prime, because the next prime (121002010009) can be obtained adding 121002010001 to its sum of digits (8).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106602250000 + 14399760001 = 326500^2 + 119999^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002010001 - 2⁶ = 121002009937 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002010009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501005000 + 60501005001.

It is an arithmetic number, because the mean of its divisors is an integer number (60501005001).

Almost surely, 2^121002010001 is an apocalyptic number.

It is an amenable number.

121002010001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002010001 is an equidigital number, since it uses as much as digits as its factorization.

121002010001 is an evil number, because the sum of its binary digits is even.

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

Adding to 121002010001 its reverse (100010200121), we get a palindrome (221012210122).

The spelling of 121002010001 in words is "one hundred twenty-one billion, two million, ten thousand, one".