1021100121201 has 16 divisors (see below), whose sum is σ = 1402011980864. Its totient is φ = 660559489344.

The previous prime is 1021100121191. The next prime is 1021100121241. The reversal of 1021100121201 is 1021210011201.

It is not a de Polignac number, because 1021100121201 - 2⁵ = 1021100121169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021100121241) 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, 12289831 + ... + 12372636.

It is an arithmetic number, because the mean of its divisors is an integer number (87625748804).

Almost surely, 2^{1021100121201} is an apocalyptic number.

It is an amenable number.

1021100121201 is a deficient number, since it is larger than the sum of its proper divisors (380911859663).

1021100121201 is a wasteful number, since it uses less digits than its factorization.

1021100121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24662880.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021100121201 its reverse (1021210011201), we get a palindrome (2042310132402).

The spelling of 1021100121201 in words is "one trillion, twenty-one billion, one hundred million, one hundred twenty-one thousand, two hundred one".