222648877421 has 2 divisors, whose sum is σ = 222648877422. Its totient is φ = 222648877420.

The previous prime is 222648877403. The next prime is 222648877457. The reversal of 222648877421 is 124778846222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188603461225 + 34045416196 = 434285^2 + 184514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222648877421 is a prime.

It is a super-2 number, since 2×222648877421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222648877021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111324438710 + 111324438711.

It is an arithmetic number, because the mean of its divisors is an integer number (111324438711).

Almost surely, 2^222648877421 is an apocalyptic number.

It is an amenable number.

222648877421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222648877421 is an equidigital number, since it uses as much as digits as its factorization.

222648877421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4816896, while the sum is 53.

The spelling of 222648877421 in words is "two hundred twenty-two billion, six hundred forty-eight million, eight hundred seventy-seven thousand, four hundred twenty-one".