77220022201 has 4 divisors (see below), whose sum is σ = 88251453952. Its totient is φ = 66188590452.

The previous prime is 77220022181. The next prime is 77220022207. The reversal of 77220022201 is 10222002277.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77220022201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77220022207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5515715865 + ... + 5515715878.

It is an arithmetic number, because the mean of its divisors is an integer number (22062863488).

Almost surely, 2^77220022201 is an apocalyptic number.

It is an amenable number.

77220022201 is a deficient number, since it is larger than the sum of its proper divisors (11031431751).

77220022201 is a wasteful number, since it uses less digits than its factorization.

77220022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11031431750.

The product of its (nonzero) digits is 1568, while the sum is 25.

Adding to 77220022201 its reverse (10222002277), we get a palindrome (87442024478).

The spelling of 77220022201 in words is "seventy-seven billion, two hundred twenty million, twenty-two thousand, two hundred one".