190521101 has 2 divisors, whose sum is σ = 190521102. Its totient is φ = 190521100.

The previous prime is 190521073. The next prime is 190521157. The reversal of 190521101 is 101125091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162537001 + 27984100 = 12749^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 190521101 - 2²² = 186326797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190521161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95260550 + 95260551.

It is an arithmetic number, because the mean of its divisors is an integer number (95260551).

Almost surely, 2^190521101 is an apocalyptic number.

It is an amenable number.

190521101 is a deficient number, since it is larger than the sum of its proper divisors (1).

190521101 is an equidigital number, since it uses as much as digits as its factorization.

190521101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 190521101 is about 13802.9381292535. The cubic root of 190521101 is about 575.4147993726.

Adding to 190521101 its reverse (101125091), we get a palindrome (291646192).

The spelling of 190521101 in words is "one hundred ninety million, five hundred twenty-one thousand, one hundred one".