2011000202021 has 4 divisors (see below), whose sum is σ = 2011154515692. Its totient is φ = 2010845888352.

The previous prime is 2011000202011. The next prime is 2011000202053. The reversal of 2011000202021 is 1202020001102.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1275745401121 + 735254800900 = 1129489^2 + 857470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011000202021 - 2¹⁰ = 2011000200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011000201993 and 2011000202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011000202011) 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, 77137286 + ... + 77163351.

It is an arithmetic number, because the mean of its divisors is an integer number (502788628923).

Almost surely, 2^{2011000202021} is an apocalyptic number.

It is an amenable number.

2011000202021 is a deficient number, since it is larger than the sum of its proper divisors (154313671).

2011000202021 is a wasteful number, since it uses less digits than its factorization.

2011000202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154313670.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2011000202021 its reverse (1202020001102), we get a palindrome (3213020203123).

The spelling of 2011000202021 in words is "two trillion, eleven billion, two hundred two thousand, twenty-one".