220221201953 has 2 divisors, whose sum is σ = 220221201954. Its totient is φ = 220221201952.

The previous prime is 220221201911. The next prime is 220221202009. The reversal of 220221201953 is 359102122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121868715409 + 98352486544 = 349097^2 + 313612^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221201953 - 2¹⁶ = 220221136417 is a prime.

It is a super-2 number, since 2×220221201953² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220221209953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110600976 + 110110600977.

It is an arithmetic number, because the mean of its divisors is an integer number (110110600977).

Almost surely, 2^220221201953 is an apocalyptic number.

It is an amenable number.

220221201953 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221201953 is an equidigital number, since it uses as much as digits as its factorization.

220221201953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 220221201953 its reverse (359102122022), we get a palindrome (579323323975).

The spelling of 220221201953 in words is "two hundred twenty billion, two hundred twenty-one million, two hundred one thousand, nine hundred fifty-three".