1201121625 has 96 divisors (see below), whose sum is σ = 2226841344. Its totient is φ = 574464000.

The previous prime is 1201121599. The next prime is 1201121627. The reversal of 1201121625 is 5261211021.

It is not a de Polignac number, because 1201121625 - 2⁶ = 1201121561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201121627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4673497 + ... + 4673753.

It is an arithmetic number, because the mean of its divisors is an integer number (23196264).

Almost surely, 2^1201121625 is an apocalyptic number.

1201121625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201121625 is a deficient number, since it is larger than the sum of its proper divisors (1025719719).

1201121625 is a wasteful number, since it uses less digits than its factorization.

1201121625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1201121625 is about 34657.2016325612. The cubic root of 1201121625 is about 1062.9895506431.

Adding to 1201121625 its reverse (5261211021), we get a palindrome (6462332646).

The spelling of 1201121625 in words is "one billion, two hundred one million, one hundred twenty-one thousand, six hundred twenty-five".