22501121220104 has 8 divisors (see below), whose sum is σ = 42189602287710. Its totient is φ = 11250560610048.

The previous prime is 22501121219971. The next prime is 22501121220107. The reversal of 22501121220104 is 40102212110522.

It can be written as a sum of positive squares in only one way, i.e., 17597102112100 + 4904019108004 = 4194890^2 + 2214502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22501121220104² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22501121220104.

It is not an unprimeable number, because it can be changed into a prime (22501121220107) 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 as a sum of consecutive naturals, namely, 1406320076249 + ... + 1406320076264.

Almost surely, 2^{22501121220104} is an apocalyptic number.

It is an amenable number.

22501121220104 is a deficient number, since it is larger than the sum of its proper divisors (19688481067606).

22501121220104 is a wasteful number, since it uses less digits than its factorization.

22501121220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812640152519 (or 2812640152515 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 22501121220104 its reverse (40102212110522), we get a palindrome (62603333330626).

The spelling of 22501121220104 in words is "twenty-two trillion, five hundred one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred four".