20120221868951 has 2 divisors, whose sum is σ = 20120221868952. Its totient is φ = 20120221868950.

The previous prime is 20120221868947. The next prime is 20120221868969. The reversal of 20120221868951 is 15986812202102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120221868951 - 2² = 20120221868947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20120221868896 and 20120221868905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120221868911) 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, 10060110934475 + 10060110934476.

It is an arithmetic number, because the mean of its divisors is an integer number (10060110934476).

Almost surely, 2^{20120221868951} is an apocalyptic number.

20120221868951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120221868951 is an equidigital number, since it uses as much as digits as its factorization.

20120221868951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 20120221868951 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, eight hundred sixty-eight thousand, nine hundred fifty-one".