121222502501 has 12 divisors (see below), whose sum is σ = 126753817932. Its totient is φ = 115923029376.

The previous prime is 121222502477. The next prime is 121222502519. The reversal of 121222502501 is 105205222121.

It can be written as a sum of positive squares in 2 ways, for example, as 685078276 + 120537424225 = 26174^2 + 347185^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121222502501 is a prime.

It is a super-2 number, since 2×121222502501² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222502521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2267855 + ... + 2320691.

It is an arithmetic number, because the mean of its divisors is an integer number (10562818161).

Almost surely, 2^121222502501 is an apocalyptic number.

It is an amenable number.

121222502501 is a deficient number, since it is larger than the sum of its proper divisors (5531315431).

121222502501 is an equidigital number, since it uses as much as digits as its factorization.

121222502501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57220 (or 57197 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 121222502501 its reverse (105205222121), we get a palindrome (226427724622).

The spelling of 121222502501 in words is "one hundred twenty-one billion, two hundred twenty-two million, five hundred two thousand, five hundred one".