1021221122211 has 48 divisors (see below), whose sum is σ = 1542338703360. Its totient is φ = 649900627200.

The previous prime is 1021221122197. The next prime is 1021221122237. The reversal of 1021221122211 is 1122211221201.

1021221122211 is a `hidden beast` number, since 10 + 212 + 211 + 22 + 211 = 666.

1021221122211 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021221122211 - 2¹⁵ = 1021221089443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021221122111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270233920 + ... + 270237698.

It is an arithmetic number, because the mean of its divisors is an integer number (32132056320).

Almost surely, 2^{1021221122211} is an apocalyptic number.

1021221122211 is a deficient number, since it is larger than the sum of its proper divisors (521117581149).

1021221122211 is a wasteful number, since it uses less digits than its factorization.

1021221122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6093 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1021221122211 its reverse (1122211221201), we get a palindrome (2143432343412).

The spelling of 1021221122211 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".