51221365123301 has 16 divisors (see below), whose sum is σ = 55777285795200. Its totient is φ = 46851501066048.

The previous prime is 51221365123273. The next prime is 51221365123469. The reversal of 51221365123301 is 10332156312215.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51221365123301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51221365120301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37604975 + ... + 38943251.

It is an arithmetic number, because the mean of its divisors is an integer number (3486080362200).

Almost surely, 2^{51221365123301} is an apocalyptic number.

It is an amenable number.

51221365123301 is a deficient number, since it is larger than the sum of its proper divisors (4555920671899).

51221365123301 is a wasteful number, since it uses less digits than its factorization.

51221365123301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407788.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 51221365123301 in words is "fifty-one trillion, two hundred twenty-one billion, three hundred sixty-five million, one hundred twenty-three thousand, three hundred one".