1021211211 has 16 divisors (see below), whose sum is σ = 1399403808. Its totient is φ = 661939200.

The previous prime is 1021211209. The next prime is 1021211251. The reversal of 1021211211 is 1121121201.

It is not a de Polignac number, because 1021211211 - 2¹ = 1021211209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021211251) 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, 228781 + ... + 233201.

It is an arithmetic number, because the mean of its divisors is an integer number (87462738).

Almost surely, 2^1021211211 is an apocalyptic number.

1021211211 is a deficient number, since it is larger than the sum of its proper divisors (378192597).

1021211211 is a wasteful number, since it uses less digits than its factorization.

1021211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1021211211 is about 31956.3954631933. The cubic root of 1021211211 is about 1007.0209939456.

Adding to 1021211211 its reverse (1121121201), we get a palindrome (2142332412).

The spelling of 1021211211 in words is "one billion, twenty-one million, two hundred eleven thousand, two hundred eleven".