121201000210001 has 4 divisors (see below), whose sum is σ = 123487811534772. Its totient is φ = 118914188885232.

The previous prime is 121201000209953. The next prime is 121201000210021. The reversal of 121201000210001 is 100012000102121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43887246315025 + 77313753894976 = 6624745^2 + 8792824^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201000210001 - 2¹⁸ = 121200999947857 is a prime.

It is a super-2 number, since 2×121201000210001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201000210021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143405662306 + ... + 1143405662411.

It is an arithmetic number, because the mean of its divisors is an integer number (30871952883693).

Almost surely, 2^{121201000210001} is an apocalyptic number.

It is an amenable number.

121201000210001 is a deficient number, since it is larger than the sum of its proper divisors (2286811324771).

121201000210001 is an equidigital number, since it uses as much as digits as its factorization.

121201000210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286811324770.

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

Adding to 121201000210001 its reverse (100012000102121), we get a palindrome (221213000312122).

The spelling of 121201000210001 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred ten thousand, one".