1211516070 has 16 divisors (see below), whose sum is σ = 2907638640. Its totient is φ = 323070944.

The previous prime is 1211516051. The next prime is 1211516081. The reversal of 1211516070 is 706151121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211516070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20191905 + ... + 20191964.

It is an arithmetic number, because the mean of its divisors is an integer number (181727415).

Almost surely, 2^1211516070 is an apocalyptic number.

1211516070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211516070 is an abundant number, since it is smaller than the sum of its proper divisors (1696122570).

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

1211516070 is a wasteful number, since it uses less digits than its factorization.

1211516070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40383879.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1211516070 is about 34806.8394141152. The cubic root of 1211516070 is about 1066.0470999421.

Adding to 1211516070 its reverse (706151121), we get a palindrome (1917667191).

The spelling of 1211516070 in words is "one billion, two hundred eleven million, five hundred sixteen thousand, seventy".