1213020197 has 8 divisors (see below), whose sum is σ = 1233572832. Its totient is φ = 1192489200.

The previous prime is 1213020191. The next prime is 1213020217. The reversal of 1213020197 is 7910203121.

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-1213020197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213020191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140438 + ... + 148824.

It is an arithmetic number, because the mean of its divisors is an integer number (154196604).

Almost surely, 2^1213020197 is an apocalyptic number.

It is an amenable number.

1213020197 is a deficient number, since it is larger than the sum of its proper divisors (20552635).

1213020197 is an equidigital number, since it uses as much as digits as its factorization.

1213020197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10819.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1213020197 is about 34828.4394855698. The cubic root of 1213020197 is about 1066.4880920568.

The spelling of 1213020197 in words is "one billion, two hundred thirteen million, twenty thousand, one hundred ninety-seven".