221012051011 has 8 divisors (see below), whose sum is σ = 234038732400. Its totient is φ = 207988255488.

The previous prime is 221012050999. The next prime is 221012051023. The reversal of 221012051011 is 110150210122.

It is an interprime number because it is at equal distance from previous prime (221012050999) and next prime (221012051023).

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

It is not a de Polignac number, because 221012051011 - 2⁵ = 221012050979 is a prime.

It is a super-2 number, since 2×221012051011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012051081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562786 + ... + 871063.

It is an arithmetic number, because the mean of its divisors is an integer number (29254841550).

Almost surely, 2^221012051011 is an apocalyptic number.

221012051011 is a deficient number, since it is larger than the sum of its proper divisors (13026681389).

221012051011 is a wasteful number, since it uses less digits than its factorization.

221012051011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442933.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 221012051011 its reverse (110150210122), we get a palindrome (331162261133).

The spelling of 221012051011 in words is "two hundred twenty-one billion, twelve million, fifty-one thousand, eleven".