20010210211121 has 4 divisors (see below), whose sum is σ = 21549457150452. Its totient is φ = 18470963271792.

The previous prime is 20010210211051. The next prime is 20010210211151. The reversal of 20010210211121 is 12111201201002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2549211390625 + 17460998820496 = 1596625^2 + 4178636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010210211121 is a prime.

It is a super-2 number, since 2×20010210211121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010210211096 and 20010210211105.

It is not an unprimeable number, because it can be changed into a prime (20010210211151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769623469646 + ... + 769623469671.

It is an arithmetic number, because the mean of its divisors is an integer number (5387364287613).

Almost surely, 2^{20010210211121} is an apocalyptic number.

It is an amenable number.

20010210211121 is a deficient number, since it is larger than the sum of its proper divisors (1539246939331).

20010210211121 is a wasteful number, since it uses less digits than its factorization.

20010210211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539246939330.

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

Adding to 20010210211121 its reverse (12111201201002), we get a palindrome (32121411412123).

The spelling of 20010210211121 in words is "twenty trillion, ten billion, two hundred ten million, two hundred eleven thousand, one hundred twenty-one".