190100991901 has 4 divisors (see below), whose sum is σ = 190117857600. Its totient is φ = 190084126204.

The previous prime is 190100991869. The next prime is 190100991907. The reversal of 190100991901 is 109199001091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109199001091 = 131 ⋅833580161.

It is a cyclic number.

It is not a de Polignac number, because 190100991901 - 2⁵ = 190100991869 is a prime.

It is a super-2 number, since 2×190100991901² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190100991907) 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, 8415931 + ... + 8438488.

It is an arithmetic number, because the mean of its divisors is an integer number (47529464400).

Almost surely, 2^190100991901 is an apocalyptic number.

It is an amenable number.

190100991901 is a deficient number, since it is larger than the sum of its proper divisors (16865699).

190100991901 is a wasteful number, since it uses less digits than its factorization.

190100991901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865698.

The product of its (nonzero) digits is 6561, while the sum is 40.

Adding to 190100991901 its reverse (109199001091), we get a palindrome (299299992992).

The spelling of 190100991901 in words is "one hundred ninety billion, one hundred million, nine hundred ninety-one thousand, nine hundred one".