77022506231221 has 8 divisors (see below), whose sum is σ = 77516261754624. Its totient is φ = 76529138123760.

The previous prime is 77022506231201. The next prime is 77022506231233. The reversal of 77022506231221 is 12213260522077.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77022506231221 - 2³⁷ = 76885067277749 is a prime.

It is a super-2 number, since 2×77022506231221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77022506231201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96455085 + ... + 97250338.

It is an arithmetic number, because the mean of its divisors is an integer number (9689532719328).

Almost surely, 2^{77022506231221} is an apocalyptic number.

It is an amenable number.

77022506231221 is a deficient number, since it is larger than the sum of its proper divisors (493755523403).

77022506231221 is a wasteful number, since it uses less digits than its factorization.

77022506231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193707971.

The product of its (nonzero) digits is 141120, while the sum is 40.

Adding to 77022506231221 its reverse (12213260522077), we get a palindrome (89235766753298).

The spelling of 77022506231221 in words is "seventy-seven trillion, twenty-two billion, five hundred six million, two hundred thirty-one thousand, two hundred twenty-one".