222121120381 has 2 divisors, whose sum is σ = 222121120382. Its totient is φ = 222121120380.

The previous prime is 222121120357. The next prime is 222121120421. The reversal of 222121120381 is 183021121222.

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., 200480062500 + 21641057881 = 447750^2 + 147109^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121120381 - 2⁵ = 222121120349 is a prime.

It is a super-2 number, since 2×222121120381² (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 (222121190381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060560190 + 111060560191.

It is an arithmetic number, because the mean of its divisors is an integer number (111060560191).

Almost surely, 2^222121120381 is an apocalyptic number.

It is an amenable number.

222121120381 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121120381 is an equidigital number, since it uses as much as digits as its factorization.

222121120381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 222121120381 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, three hundred eighty-one".