61211212 has 12 divisors (see below), whose sum is σ = 107228016. Its totient is φ = 30574640.

The previous prime is 61211207. The next prime is 61211221. The reversal of 61211212 is 21211216.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2968 + ... + 11455.

It is an arithmetic number, because the mean of its divisors is an integer number (8935668).

Almost surely, 2^61211212 is an apocalyptic number.

It is an amenable number.

61211212 is a deficient number, since it is larger than the sum of its proper divisors (46016804).

61211212 is a wasteful number, since it uses less digits than its factorization.

61211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488 (or 15486 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 61211212 is about 7823.7594543800. The cubic root of 61211212 is about 394.1035312457.

Adding to 61211212 its reverse (21211216), we get a palindrome (82422428).

The spelling of 61211212 in words is "sixty-one million, two hundred eleven thousand, two hundred twelve".