1225235121 has 32 divisors (see below), whose sum is σ = 1879718400. Its totient is φ = 702074880.

The previous prime is 1225235117. The next prime is 1225235129. The reversal of 1225235121 is 1215325221.

It is not a de Polignac number, because 1225235121 - 2² = 1225235117 is a prime.

It is a super-2 number, since 2×1225235121² = 3002402203463769282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225235091 and 1225235100.

It is not an unprimeable number, because it can be changed into a prime (1225235129) 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, 366385 + ... + 369713.

It is an arithmetic number, because the mean of its divisors is an integer number (58741200).

Almost surely, 2^1225235121 is an apocalyptic number.

1225235121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1225235121 is a deficient number, since it is larger than the sum of its proper divisors (654483279).

1225235121 is a wasteful number, since it uses less digits than its factorization.

1225235121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its digits is 1200, while the sum is 24.

The square root of 1225235121 is about 35003.3587102724. The cubic root of 1225235121 is about 1070.0559323835.

The spelling of 1225235121 in words is "one billion, two hundred twenty-five million, two hundred thirty-five thousand, one hundred twenty-one".