1020201011221 has 8 divisors (see below), whose sum is σ = 1171172463104. Its totient is φ = 870536671920.

The previous prime is 1020201011129. The next prime is 1020201011237. The reversal of 1020201011221 is 1221101020201.

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 1020201011221 - 2²¹ = 1020198914069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020201011251) 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, 326776470 + ... + 326779591.

It is an arithmetic number, because the mean of its divisors is an integer number (146396557888).

Almost surely, 2^{1020201011221} is an apocalyptic number.

It is an amenable number.

1020201011221 is a deficient number, since it is larger than the sum of its proper divisors (150971451883).

1020201011221 is an equidigital number, since it uses as much as digits as its factorization.

1020201011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653556291.

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

Adding to 1020201011221 its reverse (1221101020201), we get a palindrome (2241302031422).

The spelling of 1020201011221 in words is "one trillion, twenty billion, two hundred one million, eleven thousand, two hundred twenty-one".