1201200101021 has 4 divisors (see below), whose sum is σ = 1201202683200. Its totient is φ = 1201197518844.

The previous prime is 1201200101011. The next prime is 1201200101029. The reversal of 1201200101021 is 1201010021021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201200101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201200100993 and 1201200101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201200101029) 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, 378101 + ... + 1595418.

It is an arithmetic number, because the mean of its divisors is an integer number (300300670800).

Almost surely, 2^{1201200101021} is an apocalyptic number.

It is an amenable number.

1201200101021 is a deficient number, since it is larger than the sum of its proper divisors (2582179).

1201200101021 is an equidigital number, since it uses as much as digits as its factorization.

1201200101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582178.

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

Adding to 1201200101021 its reverse (1201010021021), we get a palindrome (2402210122042).

The spelling of 1201200101021 in words is "one trillion, two hundred one billion, two hundred million, one hundred one thousand, twenty-one".