1201102202021 has 4 divisors (see below), whose sum is σ = 1201115827500. Its totient is φ = 1201088576544.

The previous prime is 1201102201997. The next prime is 1201102202039. The reversal of 1201102202021 is 1202022011021.

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 369651840100 + 831450361921 = 607990^2 + 911839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201102202021 - 2¹⁴ = 1201102185637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201102201987 and 1201102202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201162202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6679646 + ... + 6857103.

It is an arithmetic number, because the mean of its divisors is an integer number (300278956875).

Almost surely, 2^{1201102202021} is an apocalyptic number.

It is an amenable number.

1201102202021 is a deficient number, since it is larger than the sum of its proper divisors (13625479).

1201102202021 is an equidigital number, since it uses as much as digits as its factorization.

1201102202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13625478.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201102202021 its reverse (1202022011021), we get a palindrome (2403124213042).

The spelling of 1201102202021 in words is "one trillion, two hundred one billion, one hundred two million, two hundred two thousand, twenty-one".