1220002020091 has 2 divisors, whose sum is σ = 1220002020092. Its totient is φ = 1220002020090.

The previous prime is 1220002020079. The next prime is 1220002020101. The reversal of 1220002020091 is 1900202000221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220002020091 - 2¹⁹ = 1220001495803 is a prime.

It is a super-2 number, since 2×1220002020091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220002020791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610001010045 + 610001010046.

It is an arithmetic number, because the mean of its divisors is an integer number (610001010046).

Almost surely, 2^{1220002020091} is an apocalyptic number.

1220002020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002020091 is an equidigital number, since it uses as much as digits as its factorization.

1220002020091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 1220002020091 in words is "one trillion, two hundred twenty billion, two million, twenty thousand, ninety-one".