1021120201021 has 8 divisors (see below), whose sum is σ = 1021982540384. Its totient is φ = 1020258225360.

The previous prime is 1021120200983. The next prime is 1021120201061. The reversal of 1021120201021 is 1201020211201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021120201021 - 2¹⁵ = 1021120168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021120200992 and 1021120201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021120201061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5680111 + ... + 5857123.

It is an arithmetic number, because the mean of its divisors is an integer number (127747817548).

Almost surely, 2^{1021120201021} is an apocalyptic number.

It is an amenable number.

1021120201021 is a deficient number, since it is larger than the sum of its proper divisors (862339363).

1021120201021 is a wasteful number, since it uses less digits than its factorization.

1021120201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181851.

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

Adding to 1021120201021 its reverse (1201020211201), we get a palindrome (2222140412222).

The spelling of 1021120201021 in words is "one trillion, twenty-one billion, one hundred twenty million, two hundred one thousand, twenty-one".