1021221020211 has 16 divisors (see below), whose sum is σ = 1589255814144. Its totient is φ = 571138807104.

The previous prime is 1021221020207. The next prime is 1021221020213. The reversal of 1021221020211 is 1120201221201.

It is not a de Polignac number, because 1021221020211 - 2² = 1021221020207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021221020213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517334890 + ... + 517336863.

It is an arithmetic number, because the mean of its divisors is an integer number (99328488384).

Almost surely, 2^{1021221020211} is an apocalyptic number.

1021221020211 is a deficient number, since it is larger than the sum of its proper divisors (568034793933).

1021221020211 is a wasteful number, since it uses less digits than its factorization.

1021221020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034671810.

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

Adding to 1021221020211 its reverse (1120201221201), we get a palindrome (2141422241412).

The spelling of 1021221020211 in words is "one trillion, twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred eleven".