1211009952 has 24 divisors (see below), whose sum is σ = 3178901376. Its totient is φ = 403669952.

The previous prime is 1211009951. The next prime is 1211010029. The reversal of 1211009952 is 2599001121.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1211009951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6307248 + ... + 6307439.

It is an arithmetic number, because the mean of its divisors is an integer number (132454224).

Almost surely, 2^1211009952 is an apocalyptic number.

1211009952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211009952 is an abundant number, since it is smaller than the sum of its proper divisors (1967891424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211009952 is a wasteful number, since it uses less digits than its factorization.

1211009952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12614700 (or 12614692 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 1211009952 is about 34799.5682731841. The cubic root of 1211009952 is about 1065.8986301062.

The spelling of 1211009952 in words is "one billion, two hundred eleven million, nine thousand, nine hundred fifty-two".