20211012021 has 8 divisors (see below), whose sum is σ = 27877258080. Its totient is φ = 13009386992.

The previous prime is 20211012013. The next prime is 20211012083. The reversal of 20211012021 is 12021011202.

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 20211012021 - 2³ = 20211012013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20211011988 and 20211012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211013021) 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, 116155155 + ... + 116155328.

It is an arithmetic number, because the mean of its divisors is an integer number (3484657260).

Almost surely, 2^20211012021 is an apocalyptic number.

It is an amenable number.

20211012021 is a deficient number, since it is larger than the sum of its proper divisors (7666246059).

20211012021 is a wasteful number, since it uses less digits than its factorization.

20211012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232310515.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211012021 its reverse (12021011202), we get a palindrome (32232023223).

The spelling of 20211012021 in words is "twenty billion, two hundred eleven million, twelve thousand, twenty-one".