1021210000121 has 16 divisors (see below), whose sum is σ = 1055662792704. Its totient is φ = 987354998784.

The previous prime is 1021210000099. The next prime is 1021210000127. The reversal of 1021210000121 is 1210000121201.

It is a cyclic number.

It is not a de Polignac number, because 1021210000121 - 2²² = 1021205805817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021210000127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023641 + ... + 1757913.

It is an arithmetic number, because the mean of its divisors is an integer number (65978924544).

Almost surely, 2^{1021210000121} is an apocalyptic number.

It is an amenable number.

1021210000121 is a deficient number, since it is larger than the sum of its proper divisors (34452792583).

1021210000121 is a wasteful number, since it uses less digits than its factorization.

1021210000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734680.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021210000121 its reverse (1210000121201), we get a palindrome (2231210121322).

The spelling of 1021210000121 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.