20100211021 has 8 divisors (see below), whose sum is σ = 21936672000. Its totient is φ = 18265278240.

The previous prime is 20100210997. The next prime is 20100211031. The reversal of 20100211021 is 12011200102.

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

It is not a de Polignac number, because 20100211021 - 2¹⁵ = 20100178253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100210989 and 20100211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100211031) 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, 354456 + ... + 407233.

It is an arithmetic number, because the mean of its divisors is an integer number (2742084000).

Almost surely, 2^20100211021 is an apocalyptic number.

It is an amenable number.

20100211021 is a deficient number, since it is larger than the sum of its proper divisors (1836460979).

20100211021 is a wasteful number, since it uses less digits than its factorization.

20100211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764099.

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

Adding to 20100211021 its reverse (12011200102), we get a palindrome (32111411123).

The spelling of 20100211021 in words is "twenty billion, one hundred million, two hundred eleven thousand, twenty-one".