20202042011021 has 16 divisors (see below), whose sum is σ = 23658402149424. Its totient is φ = 17076741387264.

The previous prime is 20202042011003. The next prime is 20202042011087. The reversal of 20202042011021 is 12011024020202.

It can be written as a sum of positive squares in 8 ways, for example, as 453217089796 + 19748824921225 = 673214^2 + 4443965^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20202042011021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202042017021) 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, 1235288510 + ... + 1235304863.

It is an arithmetic number, because the mean of its divisors is an integer number (1478650134339).

Almost surely, 2^{20202042011021} is an apocalyptic number.

It is an amenable number.

20202042011021 is a deficient number, since it is larger than the sum of its proper divisors (3456360138403).

20202042011021 is a wasteful number, since it uses less digits than its factorization.

20202042011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470593440.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20202042011021 its reverse (12011024020202), we get a palindrome (32213066031223).

The spelling of 20202042011021 in words is "twenty trillion, two hundred two billion, forty-two million, eleven thousand, twenty-one".