1010202120191 has 8 divisors (see below), whose sum is σ = 1103836463184. Its totient is φ = 916867408320.

The previous prime is 1010202120167. The next prime is 1010202120197. The reversal of 1010202120191 is 1910212020101.

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

It is a cyclic number.

It is not a de Polignac number, because 1010202120191 - 2⁶ = 1010202120127 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 (1010202120197) 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, 74900726 + ... + 74914211.

It is an arithmetic number, because the mean of its divisors is an integer number (137979557898).

Almost surely, 2^{1010202120191} is an apocalyptic number.

1010202120191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1010202120191 is a deficient number, since it is larger than the sum of its proper divisors (93634342993).

1010202120191 is a wasteful number, since it uses less digits than its factorization.

1010202120191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149815561.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1010202120191 its reverse (1910212020101), we get a palindrome (2920414140292).

It can be divided in two parts, 10 and 10202120191, that added together give a palindrome (10202120201).

The spelling of 1010202120191 in words is "one trillion, ten billion, two hundred two million, one hundred twenty thousand, one hundred ninety-one".