1211020097 has 8 divisors (see below), whose sum is σ = 1384242816. Its totient is φ = 1037852352.

The previous prime is 1211020087. The next prime is 1211020103. The reversal of 1211020097 is 7900201121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211020097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211020037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59513 + ... + 77225.

It is an arithmetic number, because the mean of its divisors is an integer number (173030352).

Almost surely, 2^1211020097 is an apocalyptic number.

It is an amenable number.

1211020097 is a deficient number, since it is larger than the sum of its proper divisors (173222719).

1211020097 is an equidigital number, since it uses as much as digits as its factorization.

1211020097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27487.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1211020097 is about 34799.7140361814. The cubic root of 1211020097 is about 1065.9016065506.

The spelling of 1211020097 in words is "one billion, two hundred eleven million, twenty thousand, ninety-seven".