10021212021 has 32 divisors (see below), whose sum is σ = 13782768768. Its totient is φ = 6474470400.

The previous prime is 10021212017. The next prime is 10021212029. The reversal of 10021212021 is 12021212001.

It is not a de Polignac number, because 10021212021 - 2² = 10021212017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021211988 and 10021212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021212029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3028650 + ... + 3031956.

It is an arithmetic number, because the mean of its divisors is an integer number (430711524).

Almost surely, 2^10021212021 is an apocalyptic number.

It is an amenable number.

10021212021 is a deficient number, since it is larger than the sum of its proper divisors (3761556747).

10021212021 is a wasteful number, since it uses less digits than its factorization.

10021212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10021212021 its reverse (12021212001), we get a palindrome (22042424022).

The spelling of 10021212021 in words is "ten billion, twenty-one million, two hundred twelve thousand, twenty-one".