200221121651 has 2 divisors, whose sum is σ = 200221121652. Its totient is φ = 200221121650.

The previous prime is 200221121621. The next prime is 200221121699. The reversal of 200221121651 is 156121122002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200221121651 - 2¹⁴ = 200221105267 is a prime.

It is not a weakly prime, because it can be changed into another prime (200221121621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110560825 + 100110560826.

It is an arithmetic number, because the mean of its divisors is an integer number (100110560826).

Almost surely, 2^200221121651 is an apocalyptic number.

200221121651 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221121651 is an equidigital number, since it uses as much as digits as its factorization.

200221121651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 200221121651 its reverse (156121122002), we get a palindrome (356342243653).

The spelling of 200221121651 in words is "two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, six hundred fifty-one".