101222115261 has 16 divisors (see below), whose sum is σ = 136368973440. Its totient is φ = 66779019200.

The previous prime is 101222115251. The next prime is 101222115299. The reversal of 101222115261 is 162511222101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101222115261 - 2⁷ = 101222115133 is a prime.

It is a super-2 number, since 2×101222115261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222115251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513160 + ... + 682478.

It is an arithmetic number, because the mean of its divisors is an integer number (8523060840).

Almost surely, 2^101222115261 is an apocalyptic number.

It is an amenable number.

101222115261 is a deficient number, since it is larger than the sum of its proper divisors (35146858179).

101222115261 is a wasteful number, since it uses less digits than its factorization.

101222115261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171396.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 101222115261 its reverse (162511222101), we get a palindrome (263733337362).

The spelling of 101222115261 in words is "one hundred one billion, two hundred twenty-two million, one hundred fifteen thousand, two hundred sixty-one".