2020101981911 has 4 divisors (see below), whose sum is σ = 2175494442072. Its totient is φ = 1864709521752.

The previous prime is 2020101981893. The next prime is 2020101981923. The reversal of 2020101981911 is 1191891010202.

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 2020101981911 - 2⁶ = 2020101981847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020101981941) 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, 77696230061 + ... + 77696230086.

It is an arithmetic number, because the mean of its divisors is an integer number (543873610518).

Almost surely, 2^{2020101981911} is an apocalyptic number.

2020101981911 is a deficient number, since it is larger than the sum of its proper divisors (155392460161).

2020101981911 is a wasteful number, since it uses less digits than its factorization.

2020101981911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155392460160.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 2020101981911 in words is "two trillion, twenty billion, one hundred one million, nine hundred eighty-one thousand, nine hundred eleven".