122193685525 has 6 divisors (see below), whose sum is σ = 151520170082. Its totient is φ = 97754948400.

The previous prime is 122193685507. The next prime is 122193685543. The reversal of 122193685525 is 525586391221.

It is an interprime number because it is at equal distance from previous prime (122193685507) and next prime (122193685543).

It can be written as a sum of positive squares in 3 ways, for example, as 949749124 + 121243936401 = 30818^2 + 348201^2 .

It is not a de Polignac number, because 122193685525 - 2²³ = 122185296917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2443873686 + ... + 2443873735.

Almost surely, 2^122193685525 is an apocalyptic number.

It is an amenable number.

122193685525 is a deficient number, since it is larger than the sum of its proper divisors (29326484557).

122193685525 is an equidigital number, since it uses as much as digits as its factorization.

122193685525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887747431 (or 4887747426 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 49.

The spelling of 122193685525 in words is "one hundred twenty-two billion, one hundred ninety-three million, six hundred eighty-five thousand, five hundred twenty-five".