101222215661 has 32 divisors (see below), whose sum is σ = 120096829440. Its totient is φ = 83521313856.

The previous prime is 101222215637. The next prime is 101222215667. The reversal of 101222215661 is 166512222101.

It is a cyclic number.

It is not a de Polignac number, because 101222215661 - 2¹⁴ = 101222199277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222215667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6245210 + ... + 6261396.

It is an arithmetic number, because the mean of its divisors is an integer number (3753025920).

Almost surely, 2^101222215661 is an apocalyptic number.

It is an amenable number.

101222215661 is a deficient number, since it is larger than the sum of its proper divisors (18874613779).

101222215661 is a wasteful number, since it uses less digits than its factorization.

101222215661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16553.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 101222215661 its reverse (166512222101), we get a palindrome (267734437762).

The spelling of 101222215661 in words is "one hundred one billion, two hundred twenty-two million, two hundred fifteen thousand, six hundred sixty-one".