221021010101012 has 24 divisors (see below), whose sum is σ = 421949843542080. Its totient is φ = 100463942538560.

The previous prime is 221021010101011. The next prime is 221021010101033. The reversal of 221021010101012 is 210101010120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021010101011) 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, 28466888 + ... + 35389344.

It is an arithmetic number, because the mean of its divisors is an integer number (17581243480920).

Almost surely, 2^{221021010101012} is an apocalyptic number.

221021010101012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221021010101012 is a deficient number, since it is larger than the sum of its proper divisors (200928833441068).

221021010101012 is a wasteful number, since it uses less digits than its factorization.

221021010101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648111 (or 7648109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221021010101012 its reverse (210101010120122), we get a palindrome (431122020221134).

The spelling of 221021010101012 in words is "two hundred twenty-one trillion, twenty-one billion, ten million, one hundred one thousand, twelve".