3661212212 has 24 divisors (see below), whose sum is σ = 7338334080. Its totient is φ = 1565681760.

The previous prime is 3661212193. The next prime is 3661212223. The reversal of 3661212212 is 2122121663.

It is a happy number.

3661212212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3661212212² = 26808949722595865888, which contains 22 as substring.

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, 128912 + ... + 154727.

It is an arithmetic number, because the mean of its divisors is an integer number (305763920).

Almost surely, 2^3661212212 is an apocalyptic number.

It is an amenable number.

3661212212 is an abundant number, since it is smaller than the sum of its proper divisors (3677121868).

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

3661212212 is a wasteful number, since it uses less digits than its factorization.

3661212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284111 (or 284109 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 3661212212 is about 60507.9516427387. The cubic root of 3661212212 is about 1541.2566641493.

Adding to 3661212212 its reverse (2122121663), we get a palindrome (5783333875).

The spelling of 3661212212 in words is "three billion, six hundred sixty-one million, two hundred twelve thousand, two hundred twelve".