1101221197 has 2 divisors, whose sum is σ = 1101221198. Its totient is φ = 1101221196.

The previous prime is 1101221167. The next prime is 1101221311. The reversal of 1101221197 is 7911221011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816759241 + 284461956 = 28579^2 + 16866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221197 - 2²³ = 1092832589 is a prime.

It is a super-2 number, since 2×1101221197² = 2425376249444225618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101221167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610598 + 550610599.

It is an arithmetic number, because the mean of its divisors is an integer number (550610599).

Almost surely, 2^1101221197 is an apocalyptic number.

It is an amenable number.

1101221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221197 is an equidigital number, since it uses as much as digits as its factorization.

1101221197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

The square root of 1101221197 is about 33184.6530341964. The cubic root of 1101221197 is about 1032.6619794455.

The spelling of 1101221197 in words is "one billion, one hundred one million, two hundred twenty-one thousand, one hundred ninety-seven".