2161701212 has 36 divisors (see below), whose sum is σ = 4355552376. Its totient is φ = 930869280.

The previous prime is 2161701211. The next prime is 2161701271. The reversal of 2161701212 is 2121071612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161701211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52163 + ... + 83930.

It is an arithmetic number, because the mean of its divisors is an integer number (120987566).

Almost surely, 2^2161701212 is an apocalyptic number.

2161701212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2161701212 is an abundant number, since it is smaller than the sum of its proper divisors (2193851164).

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

2161701212 is a wasteful number, since it uses less digits than its factorization.

2161701212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136146 (or 136125 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 2161701212 is about 46494.0986792948. The cubic root of 2161701212 is about 1293.0000907179. Note that the first 4 decimals are identical.

Adding to 2161701212 its reverse (2121071612), we get a palindrome (4282772824).

The spelling of 2161701212 in words is "two billion, one hundred sixty-one million, seven hundred one thousand, two hundred twelve".