12221020001251 has 2 divisors, whose sum is σ = 12221020001252. Its totient is φ = 12221020001250.

The previous prime is 12221020001221. The next prime is 12221020001291. The reversal of 12221020001251 is 15210002012221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221020001251 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221020001221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110510000625 + 6110510000626.

It is an arithmetic number, because the mean of its divisors is an integer number (6110510000626).

Almost surely, 2^{12221020001251} is an apocalyptic number.

12221020001251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221020001251 is an equidigital number, since it uses as much as digits as its factorization.

12221020001251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 12221020001251 its reverse (15210002012221), we get a palindrome (27431022013472).

The spelling of 12221020001251 in words is "twelve trillion, two hundred twenty-one billion, twenty million, one thousand, two hundred fifty-one".