121236125633 has 16 divisors (see below), whose sum is σ = 140934850560. Its totient is φ = 102132992976.

The previous prime is 121236125629. The next prime is 121236125641. The reversal of 121236125633 is 336521632121.

It is a happy number.

It is not a de Polignac number, because 121236125633 - 2² = 121236125629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121236125593 and 121236125602.

It is not an unprimeable number, because it can be changed into a prime (121236125683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2011766 + ... + 2071152.

It is an arithmetic number, because the mean of its divisors is an integer number (8808428160).

Almost surely, 2^121236125633 is an apocalyptic number.

It is an amenable number.

121236125633 is a deficient number, since it is larger than the sum of its proper divisors (19698724927).

121236125633 is an equidigital number, since it uses as much as digits as its factorization.

121236125633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64396.

The product of its digits is 38880, while the sum is 35.

Adding to 121236125633 its reverse (336521632121), we get a palindrome (457757757754).

The spelling of 121236125633 in words is "one hundred twenty-one billion, two hundred thirty-six million, one hundred twenty-five thousand, six hundred thirty-three".