1202120191 has 4 divisors (see below), whose sum is σ = 1202569272. Its totient is φ = 1201671112.

The previous prime is 1202120141. The next prime is 1202120197. The reversal of 1202120191 is 1910212021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1202120191 - 2¹⁷ = 1201989119 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 (1202120197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220501 + ... + 225886.

It is an arithmetic number, because the mean of its divisors is an integer number (300642318).

Almost surely, 2^1202120191 is an apocalyptic number.

1202120191 is a deficient number, since it is larger than the sum of its proper divisors (449081).

1202120191 is an equidigital number, since it uses as much as digits as its factorization.

1202120191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449080.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1202120191 is about 34671.6049671774. The cubic root of 1202120191 is about 1063.2840451621.

The spelling of 1202120191 in words is "one billion, two hundred two million, one hundred twenty thousand, one hundred ninety-one".