202012011911 has 4 divisors (see below), whose sum is σ = 206310139872. Its totient is φ = 197713883952.

The previous prime is 202012011893. The next prime is 202012011923. The reversal of 202012011911 is 119110210202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119110210202 = 2 ⋅59555105101.

It is a cyclic number.

It is not a de Polignac number, because 202012011911 - 2¹⁰ = 202012010887 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 (202012013911) 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, 2149063910 + ... + 2149064003.

It is an arithmetic number, because the mean of its divisors is an integer number (51577534968).

Almost surely, 2^202012011911 is an apocalyptic number.

202012011911 is a deficient number, since it is larger than the sum of its proper divisors (4298127961).

202012011911 is an equidigital number, since it uses as much as digits as its factorization.

202012011911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298127960.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 202012011911 in words is "two hundred two billion, twelve million, eleven thousand, nine hundred eleven".