20010100201021 has 8 divisors (see below), whose sum is σ = 22880974344704. Its totient is φ = 17142298157520.

The previous prime is 20010100200919. The next prime is 20010100201031. The reversal of 20010100201021 is 12010200101002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010100201021 is a prime.

It is a super-2 number, since 2×20010100201021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20010100200989 and 20010100201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010100201031) 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, 768011085 + ... + 768037138.

It is an arithmetic number, because the mean of its divisors is an integer number (2860121793088).

Almost surely, 2^{20010100201021} is an apocalyptic number.

It is an amenable number.

20010100201021 is a deficient number, since it is larger than the sum of its proper divisors (2870874143683).

20010100201021 is a wasteful number, since it uses less digits than its factorization.

20010100201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536050091.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010100201021 its reverse (12010200101002), we get a palindrome (32020300302023).

The spelling of 20010100201021 in words is "twenty trillion, ten billion, one hundred million, two hundred one thousand, twenty-one".