20221121011001 has 2 divisors, whose sum is σ = 20221121011002. Its totient is φ = 20221121011000.

The previous prime is 20221121010931. The next prime is 20221121011031. The reversal of 20221121011001 is 10011012112202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10395723577600 + 9825397433401 = 3224240^2 + 3134549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221121011001 is a prime.

It is a super-2 number, since 2×20221121011001² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20221121011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110560505500 + 10110560505501.

It is an arithmetic number, because the mean of its divisors is an integer number (10110560505501).

Almost surely, 2^{20221121011001} is an apocalyptic number.

It is an amenable number.

20221121011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221121011001 is an equidigital number, since it uses as much as digits as its factorization.

20221121011001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20221121011001 its reverse (10011012112202), we get a palindrome (30232133123203).

The spelling of 20221121011001 in words is "twenty trillion, two hundred twenty-one billion, one hundred twenty-one million, eleven thousand, one".