221012010123 has 8 divisors (see below), whose sum is σ = 298833140736. Its totient is φ = 145266109800.

The previous prime is 221012010119. The next prime is 221012010139. The reversal of 221012010123 is 321010210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221012010123 - 2² = 221012010119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221012010623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518807323 + ... + 518807748.

It is an arithmetic number, because the mean of its divisors is an integer number (37354142592).

Almost surely, 2^221012010123 is an apocalyptic number.

221012010123 is a deficient number, since it is larger than the sum of its proper divisors (77821130613).

221012010123 is a wasteful number, since it uses less digits than its factorization.

221012010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037615145.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221012010123 its reverse (321010210122), we get a palindrome (542022220245).

The spelling of 221012010123 in words is "two hundred twenty-one billion, twelve million, ten thousand, one hundred twenty-three".