1021210002121 has 4 divisors (see below), whose sum is σ = 1021574332432. Its totient is φ = 1020845671812.

The previous prime is 1021210002023. The next prime is 1021210002133. The reversal of 1021210002121 is 1212000121201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021210002121 - 2³⁵ = 986850263753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021210002181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182160951 + ... + 182166556.

It is an arithmetic number, because the mean of its divisors is an integer number (255393583108).

Almost surely, 2^{1021210002121} is an apocalyptic number.

It is an amenable number.

1021210002121 is a deficient number, since it is larger than the sum of its proper divisors (364330311).

1021210002121 is an equidigital number, since it uses as much as digits as its factorization.

1021210002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364330310.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021210002121 its reverse (1212000121201), we get a palindrome (2233210123322).

The spelling of 1021210002121 in words is "one trillion, twenty-one billion, two hundred ten million, two thousand, one hundred twenty-one".