10120221999 has 8 divisors (see below), whose sum is σ = 14992921520. Its totient is φ = 6746814648.

The previous prime is 10120221983. The next prime is 10120222001. The reversal of 10120221999 is 99912202101.

It is not a de Polignac number, because 10120221999 - 2⁴ = 10120221983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120221299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187411492 + ... + 187411545.

It is an arithmetic number, because the mean of its divisors is an integer number (1874115190).

Almost surely, 2^10120221999 is an apocalyptic number.

10120221999 is a deficient number, since it is larger than the sum of its proper divisors (4872699521).

10120221999 is an equidigital number, since it uses as much as digits as its factorization.

10120221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374823046 (or 374823040 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

It can be divided in two parts, 101202 and 21999, that added together give a square (123201 = 351²).

The spelling of 10120221999 in words is "ten billion, one hundred twenty million, two hundred twenty-one thousand, nine hundred ninety-nine".