1001012022091 has 12 divisors (see below), whose sum is σ = 1063574145072. Its totient is φ = 941938160768.

The previous prime is 1001012022083. The next prime is 1001012022103. The reversal of 1001012022091 is 1902202101001.

It is a happy number.

It is not a de Polignac number, because 1001012022091 - 2³ = 1001012022083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001012022391) 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, 1088946 + ... + 1785448.

It is an arithmetic number, because the mean of its divisors is an integer number (88631178756).

Almost surely, 2^{1001012022091} is an apocalyptic number.

1001012022091 is a deficient number, since it is larger than the sum of its proper divisors (62562122981).

1001012022091 is an equidigital number, since it uses as much as digits as its factorization.

1001012022091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701510 (or 701493 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1001012022091 its reverse (1902202101001), we get a palindrome (2903214123092).

The spelling of 1001012022091 in words is "one trillion, one billion, twelve million, twenty-two thousand, ninety-one".