10002022121 has 32 divisors (see below), whose sum is σ = 13026521088. Its totient is φ = 7462889280.

The previous prime is 10002022117. The next prime is 10002022127. The reversal of 10002022121 is 12122020001.

It is a happy number.

It is not a de Polignac number, because 10002022121 - 2² = 10002022117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10002022127) 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, 114950 + ... + 182256.

It is an arithmetic number, because the mean of its divisors is an integer number (407078784).

Almost surely, 2^10002022121 is an apocalyptic number.

It is an amenable number.

10002022121 is a deficient number, since it is larger than the sum of its proper divisors (3024498967).

10002022121 is a wasteful number, since it uses less digits than its factorization.

10002022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67421.

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

Adding to 10002022121 its reverse (12122020001), we get a palindrome (22124042122).

The spelling of 10002022121 in words is "ten billion, two million, twenty-two thousand, one hundred twenty-one".