1020000122091 has 12 divisors (see below), whose sum is σ = 1473344679768. Its totient is φ = 679994925984.

The previous prime is 1020000122083. The next prime is 1020000122123. The reversal of 1020000122091 is 1902210000201.

It is not a de Polignac number, because 1020000122091 - 2³ = 1020000122083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020000120091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116156 + ... + 1812678.

It is an arithmetic number, because the mean of its divisors is an integer number (122778723314).

Almost surely, 2^{1020000122091} is an apocalyptic number.

1020000122091 is a deficient number, since it is larger than the sum of its proper divisors (453344557677).

1020000122091 is a wasteful number, since it uses less digits than its factorization.

1020000122091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859242 (or 859239 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1020000122091 its reverse (1902210000201), we get a palindrome (2922210122292).

The spelling of 1020000122091 in words is "one trillion, twenty billion, one hundred twenty-two thousand, ninety-one".