61212051007 has 2 divisors, whose sum is σ = 61212051008. Its totient is φ = 61212051006.

The previous prime is 61212050989. The next prime is 61212051023. The reversal of 61212051007 is 70015021216.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61212051007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61212051097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30606025503 + 30606025504.

It is an arithmetic number, because the mean of its divisors is an integer number (30606025504).

Almost surely, 2^61212051007 is an apocalyptic number.

61212051007 is a deficient number, since it is larger than the sum of its proper divisors (1).

61212051007 is an equidigital number, since it uses as much as digits as its factorization.

61212051007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 61212051007 in words is "sixty-one billion, two hundred twelve million, fifty-one thousand, seven".