1301202121021 has 16 divisors (see below), whose sum is σ = 1500455347200. Its totient is φ = 1115963578800.

The previous prime is 1301202121013. The next prime is 1301202121069. The reversal of 1301202121021 is 1201212021031.

It is not a de Polignac number, because 1301202121021 - 2³ = 1301202121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301202120986 and 1301202121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301202121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12974835 + ... + 13074736.

It is an arithmetic number, because the mean of its divisors is an integer number (93778459200).

Almost surely, 2^{1301202121021} is an apocalyptic number.

1301202121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1301202121021 is a deficient number, since it is larger than the sum of its proper divisors (199253226179).

1301202121021 is a wasteful number, since it uses less digits than its factorization.

1301202121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26049840.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1301202121021 its reverse (1201212021031), we get a palindrome (2502414142052).

The spelling of 1301202121021 in words is "one trillion, three hundred one billion, two hundred two million, one hundred twenty-one thousand, twenty-one".