1201002001021 has 16 divisors (see below), whose sum is σ = 1233765561600. Its totient is φ = 1168658008000.

The previous prime is 1201002000997. The next prime is 1201002001039.

1201002001021 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1201002001021 - 2⁷ = 1201002000893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201002000989 and 1201002001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201002001621) 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, 25427295 + ... + 25474483.

It is an arithmetic number, because the mean of its divisors is an integer number (77110347600).

Almost surely, 2^{1201002001021} is an apocalyptic number.

It is an amenable number.

1201002001021 is a deficient number, since it is larger than the sum of its proper divisors (32763560579).

1201002001021 is a wasteful number, since it uses less digits than its factorization.

1201002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51620.

The product of its (nonzero) digits is 8, while the sum is 10.

The spelling of 1201002001021 in words is "one trillion, two hundred one billion, two million, one thousand, twenty-one".