1961224101 has 6 divisors (see below), whose sum is σ = 2832879270. Its totient is φ = 1307482728.

The previous prime is 1961224073. The next prime is 1961224103. The reversal of 1961224101 is 1014221691.

1961224101 is a `hidden beast` number, since 1 + 9 + 612 + 2 + 41 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1753431876 + 207792225 = 41874^2 + 14415^2 .

It is not a de Polignac number, because 1961224101 - 2¹⁵ = 1961191333 is a prime.

It is a super-3 number, since 3×1961224101³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961224103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108956886 + ... + 108956903.

It is an arithmetic number, because the mean of its divisors is an integer number (472146545).

Almost surely, 2^1961224101 is an apocalyptic number.

It is an amenable number.

1961224101 is a deficient number, since it is larger than the sum of its proper divisors (871655169).

1961224101 is a wasteful number, since it uses less digits than its factorization.

1961224101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217913795 (or 217913792 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1961224101 is about 44285.7098960827. The cubic root of 1961224101 is about 1251.7254254431.

Adding to 1961224101 its reverse (1014221691), we get a palindrome (2975445792).

The spelling of 1961224101 in words is "one billion, nine hundred sixty-one million, two hundred twenty-four thousand, one hundred one".