1211772914 has 16 divisors (see below), whose sum is σ = 2005184160. Its totient is φ = 544616160.

The previous prime is 1211772911. The next prime is 1211772923. The reversal of 1211772914 is 4192771121.

It is not an unprimeable number, because it can be changed into a prime (1211772911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307484 + ... + 311399.

It is an arithmetic number, because the mean of its divisors is an integer number (125324010).

Almost surely, 2^1211772914 is an apocalyptic number.

1211772914 is a deficient number, since it is larger than the sum of its proper divisors (793411246).

1211772914 is a wasteful number, since it uses less digits than its factorization.

1211772914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618985.

The product of its digits is 7056, while the sum is 35.

The square root of 1211772914 is about 34810.5287808157. The cubic root of 1211772914 is about 1066.1224293747.

The spelling of 1211772914 in words is "one billion, two hundred eleven million, seven hundred seventy-two thousand, nine hundred fourteen".