20212002021 has 8 divisors (see below), whose sum is σ = 26956679904. Its totient is φ = 13470996080.

The previous prime is 20212002017. The next prime is 20212002043. The reversal of 20212002021 is 12020021202.

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

It is a cyclic number.

It is not a de Polignac number, because 20212002021 - 2² = 20212002017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212001988 and 20212002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212002071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905115 + ... + 927176.

It is an arithmetic number, because the mean of its divisors is an integer number (3369584988).

Almost surely, 2^20212002021 is an apocalyptic number.

It is an amenable number.

20212002021 is a deficient number, since it is larger than the sum of its proper divisors (6744677883).

20212002021 is a wasteful number, since it uses less digits than its factorization.

20212002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835971.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20212002021 its reverse (12020021202), we get a palindrome (32232023223).

The spelling of 20212002021 in words is "twenty billion, two hundred twelve million, two thousand, twenty-one".