10022012020991 has 4 divisors (see below), whose sum is σ = 10031827900584. Its totient is φ = 10012196141400.

The previous prime is 10022012020963. The next prime is 10022012021003. The reversal of 10022012020991 is 19902021022001.

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

It is a cyclic number.

It is not a de Polignac number, because 10022012020991 - 2⁶ = 10022012020927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10022012020961) 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, 4907938265 + ... + 4907940306.

It is an arithmetic number, because the mean of its divisors is an integer number (2507956975146).

Almost surely, 2^{10022012020991} is an apocalyptic number.

10022012020991 is a deficient number, since it is larger than the sum of its proper divisors (9815879593).

10022012020991 is an equidigital number, since it uses as much as digits as its factorization.

10022012020991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815879592.

The product of its (nonzero) digits is 1296, while the sum is 29.

Adding to 10022012020991 its reverse (19902021022001), we get a palindrome (29924033042992).

The spelling of 10022012020991 in words is "ten trillion, twenty-two billion, twelve million, twenty thousand, nine hundred ninety-one".