21022002102121 has 8 divisors (see below), whose sum is σ = 21166879002624. Its totient is φ = 20877487848480.

The previous prime is 21022002102107. The next prime is 21022002102259. The reversal of 21022002102121 is 12120120022012.

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 21022002102121 - 2⁹ = 21022002101609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022002102095 and 21022002102104.

It is not an unprimeable number, because it can be changed into a prime (21022002202121) 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, 90545380 + ... + 90777253.

It is an arithmetic number, because the mean of its divisors is an integer number (2645859875328).

Almost surely, 2^{21022002102121} is an apocalyptic number.

It is an amenable number.

21022002102121 is a deficient number, since it is larger than the sum of its proper divisors (144876900503).

21022002102121 is a wasteful number, since it uses less digits than its factorization.

21022002102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181323431.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022002102121 its reverse (12120120022012), we get a palindrome (33142122124133).

The spelling of 21022002102121 in words is "twenty-one trillion, twenty-two billion, two million, one hundred two thousand, one hundred twenty-one".