2021211202021 has 8 divisors (see below), whose sum is σ = 2213742369888. Its totient is φ = 1830144150000.

The previous prime is 2021211202007. The next prime is 2021211202051. The reversal of 2021211202021 is 1202021121202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021211202021 is a prime.

It is a super-4 number, since 4×2021211202021⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021211201986 and 2021211202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021211202051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366026070 + ... + 366031591.

It is an arithmetic number, because the mean of its divisors is an integer number (276717796236).

Almost surely, 2^{2021211202021} is an apocalyptic number.

It is an amenable number.

2021211202021 is a deficient number, since it is larger than the sum of its proper divisors (192531167867).

2021211202021 is a wasteful number, since it uses less digits than its factorization.

2021211202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732057923.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021211202021 its reverse (1202021121202), we get a palindrome (3223232323223).

The spelling of 2021211202021 in words is "two trillion, twenty-one billion, two hundred eleven million, two hundred two thousand, twenty-one".