20110211021 has 8 divisors (see below), whose sum is σ = 21203188320. Its totient is φ = 19020688272.

The previous prime is 20110210999. The next prime is 20110211053. The reversal of 20110211021 is 12011201102.

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-20110211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110210993 and 20110211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110271021) 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, 851675 + ... + 874968.

It is an arithmetic number, because the mean of its divisors is an integer number (2650398540).

Almost surely, 2^20110211021 is an apocalyptic number.

It is an amenable number.

20110211021 is a deficient number, since it is larger than the sum of its proper divisors (1092977299).

20110211021 is a wasteful number, since it uses less digits than its factorization.

20110211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727275.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110211021 its reverse (12011201102), we get a palindrome (32121412123).

The spelling of 20110211021 in words is "twenty billion, one hundred ten million, two hundred eleven thousand, twenty-one".