21222021022087 has 2 divisors, whose sum is σ = 21222021022088. Its totient is φ = 21222021022086.

The previous prime is 21222021022079. The next prime is 21222021022171. The reversal of 21222021022087 is 78022012022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222021022087 - 2³ = 21222021022079 is a prime.

It is a super-2 number, since 2×21222021022087² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222021022687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611010511043 + 10611010511044.

It is an arithmetic number, because the mean of its divisors is an integer number (10611010511044).

Almost surely, 2^{21222021022087} is an apocalyptic number.

21222021022087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222021022087 is an equidigital number, since it uses as much as digits as its factorization.

21222021022087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 31.

Adding to 21222021022087 its reverse (78022012022212), we get a palindrome (99244033044299).

The spelling of 21222021022087 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-two thousand, eighty-seven".