10202022121 has 2 divisors, whose sum is σ = 10202022122. Its totient is φ = 10202022120.

The previous prime is 10202022109. The next prime is 10202022137. The reversal of 10202022121 is 12122020201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10201000000 + 1022121 = 101000^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202022121 - 2¹⁹ = 10201497833 is a prime.

It is not a weakly prime, because it can be changed into another prime (10202022161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101011060 + 5101011061.

It is an arithmetic number, because the mean of its divisors is an integer number (5101011061).

Almost surely, 2^10202022121 is an apocalyptic number.

It is an amenable number.

10202022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202022121 is an equidigital number, since it uses as much as digits as its factorization.

10202022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10202022121 its reverse (12122020201), we get a palindrome (22324042322).

The spelling of 10202022121 in words is "ten billion, two hundred two million, twenty-two thousand, one hundred twenty-one".