2221421101 has 2 divisors, whose sum is σ = 2221421102. Its totient is φ = 2221421100.

The previous prime is 2221421089. The next prime is 2221421131. The reversal of 2221421101 is 1011241222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1981140100 + 240281001 = 44510^2 + 15501^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221421101 - 2⁷ = 2221420973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221421131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110710550 + 1110710551.

It is an arithmetic number, because the mean of its divisors is an integer number (1110710551).

Almost surely, 2^2221421101 is an apocalyptic number.

It is an amenable number.

2221421101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221421101 is an equidigital number, since it uses as much as digits as its factorization.

2221421101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2221421101 is about 47131.9541394159. The cubic root of 2221421101 is about 1304.7990473643.

Adding to 2221421101 its reverse (1011241222), we get a palindrome (3232662323).

The spelling of 2221421101 in words is "two billion, two hundred twenty-one million, four hundred twenty-one thousand, one hundred one".