1211025885 has 32 divisors (see below), whose sum is σ = 1988789760. Its totient is φ = 629011968.

The previous prime is 1211025847. The next prime is 1211025887. The reversal of 1211025885 is 5885201121.

1211025885 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211025885 - 2⁹ = 1211025373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211025887) 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, 103356 + ... + 114474.

It is an arithmetic number, because the mean of its divisors is an integer number (62149680).

Almost surely, 2^1211025885 is an apocalyptic number.

1211025885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211025885 is a deficient number, since it is larger than the sum of its proper divisors (777763875).

1211025885 is a wasteful number, since it uses less digits than its factorization.

1211025885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11317.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 1211025885 is about 34799.7971976849. The cubic root of 1211025885 is about 1065.9033046861.

The spelling of 1211025885 in words is "one billion, two hundred eleven million, twenty-five thousand, eight hundred eighty-five".