1021222021111 has 2 divisors, whose sum is σ = 1021222021112. Its totient is φ = 1021222021110.

The previous prime is 1021222021103. The next prime is 1021222021117. The reversal of 1021222021111 is 1111202221201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021222021111 - 2³ = 1021222021103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021222021117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510611010555 + 510611010556.

It is an arithmetic number, because the mean of its divisors is an integer number (510611010556).

Almost surely, 2^{1021222021111} is an apocalyptic number.

1021222021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021222021111 is an equidigital number, since it uses as much as digits as its factorization.

1021222021111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021222021111 its reverse (1111202221201), we get a palindrome (2132424242312).

The spelling of 1021222021111 in words is "one trillion, twenty-one billion, two hundred twenty-two million, twenty-one thousand, one hundred eleven".