1010220232091 has 4 divisors (see below), whose sum is σ = 1154537408112. Its totient is φ = 865903056072.

The previous prime is 1010220231997. The next prime is 1010220232123. The reversal of 1010220232091 is 1902320220101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010220232091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010220232391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72158588000 + ... + 72158588013.

It is an arithmetic number, because the mean of its divisors is an integer number (288634352028).

Almost surely, 2^{1010220232091} is an apocalyptic number.

1010220232091 is a deficient number, since it is larger than the sum of its proper divisors (144317176021).

1010220232091 is an equidigital number, since it uses as much as digits as its factorization.

1010220232091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144317176020.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1010220232091 its reverse (1902320220101), we get a palindrome (2912540452192).

The spelling of 1010220232091 in words is "one trillion, ten billion, two hundred twenty million, two hundred thirty-two thousand, ninety-one".