10021211021 has 16 divisors (see below), whose sum is σ = 11275770240. Its totient is φ = 8859502080.

The previous prime is 10021211003. The next prime is 10021211069. The reversal of 10021211021 is 12011212001.

It is a cyclic number.

It is not a de Polignac number, because 10021211021 - 2⁶ = 10021210957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021210993 and 10021211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021211071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261740 + ... + 297573.

It is an arithmetic number, because the mean of its divisors is an integer number (704735640).

Almost surely, 2^10021211021 is an apocalyptic number.

It is an amenable number.

10021211021 is a deficient number, since it is larger than the sum of its proper divisors (1254559219).

10021211021 is a wasteful number, since it uses less digits than its factorization.

10021211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559396.

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

Adding to 10021211021 its reverse (12011212001), we get a palindrome (22032423022).

The spelling of 10021211021 in words is "ten billion, twenty-one million, two hundred eleven thousand, twenty-one".