220021211219077 has 2 divisors, whose sum is σ = 220021211219078. Its totient is φ = 220021211219076.

The previous prime is 220021211219041. The next prime is 220021211219141. The reversal of 220021211219077 is 770912112120022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217891578844801 + 2129632374276 = 14761151^2 + 1459326^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021211219077 - 2²³ = 220021202830469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220021211219977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010605609538 + 110010605609539.

It is an arithmetic number, because the mean of its divisors is an integer number (110010605609539).

Almost surely, 2^{220021211219077} is an apocalyptic number.

It is an amenable number.

220021211219077 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021211219077 is an equidigital number, since it uses as much as digits as its factorization.

220021211219077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

Adding to 220021211219077 its reverse (770912112120022), we get a palindrome (990933323339099).

The spelling of 220021211219077 in words is "two hundred twenty trillion, twenty-one billion, two hundred eleven million, two hundred nineteen thousand, seventy-seven".