20110202021 has 8 divisors (see below), whose sum is σ = 24751017984. Its totient is φ = 15911368560.

The previous prime is 20110202017. The next prime is 20110202039. The reversal of 20110202021 is 12020201102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20110202021 - 2² = 20110202017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110201993 and 20110202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110202081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110495525 + ... + 110495706.

It is an arithmetic number, because the mean of its divisors is an integer number (3093877248).

Almost surely, 2^20110202021 is an apocalyptic number.

It is an amenable number.

20110202021 is a deficient number, since it is larger than the sum of its proper divisors (4640815963).

20110202021 is a wasteful number, since it uses less digits than its factorization.

20110202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220991251.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20110202021 its reverse (12020201102), we get a palindrome (32130403123).

The spelling of 20110202021 in words is "twenty billion, one hundred ten million, two hundred two thousand, twenty-one".