20211201111021 has 8 divisors (see below), whose sum is σ = 27025928864544. Its totient is φ = 13435303715760.

The previous prime is 20211201110879. The next prime is 20211201111041. The reversal of 20211201111021 is 12011110211202.

It is a happy number.

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

It is not a de Polignac number, because 20211201111021 - 2²⁵ = 20211167556589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211201111041) 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, 9707588350 + ... + 9707590431.

It is an arithmetic number, because the mean of its divisors is an integer number (3378241108068).

Almost surely, 2^{20211201111021} is an apocalyptic number.

It is an amenable number.

20211201111021 is a deficient number, since it is larger than the sum of its proper divisors (6814727753523).

20211201111021 is a wasteful number, since it uses less digits than its factorization.

20211201111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19415179131.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20211201111021 its reverse (12011110211202), we get a palindrome (32222311322223).

The spelling of 20211201111021 in words is "twenty trillion, two hundred eleven billion, two hundred one million, one hundred eleven thousand, twenty-one".