1021012210221 has 8 divisors (see below), whose sum is σ = 1420538727360. Its totient is φ = 651080249952.

The previous prime is 1021012210217. The next prime is 1021012210279. The reversal of 1021012210221 is 1220122101201.

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

It is not a de Polignac number, because 1021012210221 - 2² = 1021012210217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021012210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021012210201) 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, 7398639136 + ... + 7398639273.

It is an arithmetic number, because the mean of its divisors is an integer number (177567340920).

Almost surely, 2^{1021012210221} is an apocalyptic number.

It is an amenable number.

1021012210221 is a deficient number, since it is larger than the sum of its proper divisors (399526517139).

1021012210221 is a wasteful number, since it uses less digits than its factorization.

1021012210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14797278435.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021012210221 its reverse (1220122101201), we get a palindrome (2241134311422).

The spelling of 1021012210221 in words is "one trillion, twenty-one billion, twelve million, two hundred ten thousand, two hundred twenty-one".