21221011122019 has 2 divisors, whose sum is σ = 21221011122020. Its totient is φ = 21221011122018.

The previous prime is 21221011121993. The next prime is 21221011122251. The reversal of 21221011122019 is 91022111012212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221011122019 - 2²¹ = 21221009024867 is a prime.

It is a super-2 number, since 2×21221011122019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21221011121984 and 21221011122002.

It is not a weakly prime, because it can be changed into another prime (21221011122319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610505561009 + 10610505561010.

It is an arithmetic number, because the mean of its divisors is an integer number (10610505561010).

Almost surely, 2^{21221011122019} is an apocalyptic number.

21221011122019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221011122019 is an equidigital number, since it uses as much as digits as its factorization.

21221011122019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 21221011122019 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty-two thousand, nineteen".