61212421216 has 12 divisors (see below), whose sum is σ = 120511954332. Its totient is φ = 30606210592.

The previous prime is 61212421187. The next prime is 61212421219.

61212421216 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×61212421216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61212421219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956444050 + ... + 956444113.

It is an arithmetic number, because the mean of its divisors is an integer number (10042662861).

Almost surely, 2^61212421216 is an apocalyptic number.

It is an amenable number.

61212421216 is a deficient number, since it is larger than the sum of its proper divisors (59299533116).

61212421216 is a wasteful number, since it uses less digits than its factorization.

61212421216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912888173 (or 1912888165 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The spelling of 61212421216 in words is "sixty-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred sixteen".