2020020211091 has 4 divisors (see below), whose sum is σ = 2021721998472. Its totient is φ = 2018318423712.

The previous prime is 2020020211087. The next prime is 2020020211147. The reversal of 2020020211091 is 1901120200202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2020020211091 - 2² = 2020020211087 is a prime.

It is a super-2 number, since 2×2020020211091² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020020213091) 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, 850891910 + ... + 850894283.

It is an arithmetic number, because the mean of its divisors is an integer number (505430499618).

Almost surely, 2^{2020020211091} is an apocalyptic number.

2020020211091 is a deficient number, since it is larger than the sum of its proper divisors (1701787381).

2020020211091 is a wasteful number, since it uses less digits than its factorization.

2020020211091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701787380.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2020020211091 its reverse (1901120200202), we get a palindrome (3921140411293).

The spelling of 2020020211091 in words is "two trillion, twenty billion, twenty million, two hundred eleven thousand, ninety-one".