1021220010221 has 8 divisors (see below), whose sum is σ = 1022322328704. Its totient is φ = 1020117822640.

The previous prime is 1021220010211. The next prime is 1021220010233. The reversal of 1021220010221 is 1220100221201.

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 1021220010221 - 2⁶ = 1021220010157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021220010196 and 1021220010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220010211) 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, 31289291 + ... + 31321911.

It is an arithmetic number, because the mean of its divisors is an integer number (127790291088).

Almost surely, 2^{1021220010221} is an apocalyptic number.

It is an amenable number.

1021220010221 is a deficient number, since it is larger than the sum of its proper divisors (1102318483).

1021220010221 is an equidigital number, since it uses as much as digits as its factorization.

1021220010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65451.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021220010221 its reverse (1220100221201), we get a palindrome (2241320231422).

The spelling of 1021220010221 in words is "one trillion, twenty-one billion, two hundred twenty million, ten thousand, two hundred twenty-one".