1020212122091 has 2 divisors, whose sum is σ = 1020212122092. Its totient is φ = 1020212122090.

The previous prime is 1020212122057. The next prime is 1020212122099. The reversal of 1020212122091 is 1902212120201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020212122091 is a prime.

It is a super-2 number, since 2×1020212122091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020212122099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106061045 + 510106061046.

It is an arithmetic number, because the mean of its divisors is an integer number (510106061046).

Almost surely, 2^{1020212122091} is an apocalyptic number.

1020212122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212122091 is an equidigital number, since it uses as much as digits as its factorization.

1020212122091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 1020212122091 its reverse (1902212120201), we get a palindrome (2922424242292).

The spelling of 1020212122091 in words is "one trillion, twenty billion, two hundred twelve million, one hundred twenty-two thousand, ninety-one".