20021021111201 has 8 divisors (see below), whose sum is σ = 21853717026624. Its totient is φ = 18190425710320.

The previous prime is 20021021111171. The next prime is 20021021111207. The reversal of 20021021111201 is 10211112012002.

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 20021021111201 - 2²⁶ = 20020954002337 is a prime.

It is a super-2 number, since 2×20021021111201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021021111207) 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, 525108701 + ... + 525146826.

It is an arithmetic number, because the mean of its divisors is an integer number (2731714628328).

Almost surely, 2^{20021021111201} is an apocalyptic number.

It is an amenable number.

20021021111201 is a deficient number, since it is larger than the sum of its proper divisors (1832695915423).

20021021111201 is a wasteful number, since it uses less digits than its factorization.

20021021111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050257271.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20021021111201 its reverse (10211112012002), we get a palindrome (30232133123203).

It can be divided in two parts, 2002 and 1021111201, that multiplied together give a palindrome (2044264624402).

The spelling of 20021021111201 in words is "twenty trillion, twenty-one billion, twenty-one million, one hundred eleven thousand, two hundred one".