20211201021 has 8 divisors (see below), whose sum is σ = 29398110624. Its totient is φ = 12249212720.

The previous prime is 20211201019. The next prime is 20211201041. The reversal of 20211201021 is 12010211202.

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 20211201021 - 2¹ = 20211201019 is a prime.

It is a super-2 number, since 2×20211201021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211200988 and 20211201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211201041) 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, 306230286 + ... + 306230351.

It is an arithmetic number, because the mean of its divisors is an integer number (3674763828).

Almost surely, 2^20211201021 is an apocalyptic number.

It is an amenable number.

20211201021 is a deficient number, since it is larger than the sum of its proper divisors (9186909603).

20211201021 is a wasteful number, since it uses less digits than its factorization.

20211201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612460651.

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

Adding to 20211201021 its reverse (12010211202), we get a palindrome (32221412223).

The spelling of 20211201021 in words is "twenty billion, two hundred eleven million, two hundred one thousand, twenty-one".