1021001120221 has 8 divisors (see below), whose sum is σ = 1027214879040. Its totient is φ = 1014788551968.

The previous prime is 1021001120207. The next prime is 1021001120233. The reversal of 1021001120221 is 1220211001201.

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 1021001120221 - 2⁵ = 1021001120189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021001120621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453990 + ... + 2038648.

It is an arithmetic number, because the mean of its divisors is an integer number (128401859880).

Almost surely, 2^{1021001120221} is an apocalyptic number.

It is an amenable number.

1021001120221 is a deficient number, since it is larger than the sum of its proper divisors (6213758819).

1021001120221 is a wasteful number, since it uses less digits than its factorization.

1021001120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595283.

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

Adding to 1021001120221 its reverse (1220211001201), we get a palindrome (2241212121422).

The spelling of 1021001120221 in words is "one trillion, twenty-one billion, one million, one hundred twenty thousand, two hundred twenty-one".