20010201021 has 12 divisors (see below), whose sum is σ = 29076701472. Its totient is φ = 13260251976.

The previous prime is 20010201019. The next prime is 20010201031. The reversal of 20010201021 is 12010201002.

It is not a de Polignac number, because 20010201021 - 2¹ = 20010201019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20010200994 and 20010201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010201031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6655251 + ... + 6658256.

It is an arithmetic number, because the mean of its divisors is an integer number (2423058456).

Almost surely, 2^20010201021 is an apocalyptic number.

It is an amenable number.

20010201021 is a deficient number, since it is larger than the sum of its proper divisors (9066500451).

20010201021 is a wasteful number, since it uses less digits than its factorization.

20010201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13313680 (or 13313677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010201021 its reverse (12010201002), we get a palindrome (32020402023).

The spelling of 20010201021 in words is "twenty billion, ten million, two hundred one thousand, twenty-one".