202010013561 has 4 divisors (see below), whose sum is σ = 269346684752. Its totient is φ = 134673342372.

The previous prime is 202010013539. The next prime is 202010013607. The reversal of 202010013561 is 165310010202.

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 not a de Polignac number, because 202010013561 - 2⁵ = 202010013529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202010013461) 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, 33668335591 + ... + 33668335596.

It is an arithmetic number, because the mean of its divisors is an integer number (67336671188).

Almost surely, 2^202010013561 is an apocalyptic number.

It is an amenable number.

202010013561 is a deficient number, since it is larger than the sum of its proper divisors (67336671191).

202010013561 is an equidigital number, since it uses as much as digits as its factorization.

202010013561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67336671190.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 202010013561 its reverse (165310010202), we get a palindrome (367320023763).

The spelling of 202010013561 in words is "two hundred two billion, ten million, thirteen thousand, five hundred sixty-one".