1021201020121 has 4 divisors (see below), whose sum is σ = 1054142988544. Its totient is φ = 988259051700.

The previous prime is 1021201020107. The next prime is 1021201020143. The reversal of 1021201020121 is 1210201021201.

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 a de Polignac number, because none of the positive numbers 2^k-1021201020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021201020101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16470984165 + ... + 16470984226.

It is an arithmetic number, because the mean of its divisors is an integer number (263535747136).

Almost surely, 2^{1021201020121} is an apocalyptic number.

It is an amenable number.

1021201020121 is a deficient number, since it is larger than the sum of its proper divisors (32941968423).

1021201020121 is an equidigital number, since it uses as much as digits as its factorization.

1021201020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32941968422.

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

Adding to 1021201020121 its reverse (1210201021201), we get a palindrome (2231402041322).

The spelling of 1021201020121 in words is "one trillion, twenty-one billion, two hundred one million, twenty thousand, one hundred twenty-one".