221121020101012 has 12 divisors (see below), whose sum is σ = 386962601169760. Its totient is φ = 110560276909656.

The previous prime is 221121020100989. The next prime is 221121020101019. The reversal of 221121020101012 is 210101020121122.

It is a super-4 number, since 4×221121020101012⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121020101019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56142462 + ... + 59951797.

Almost surely, 2^{221121020101012} is an apocalyptic number.

It is an amenable number.

221121020101012 is a deficient number, since it is larger than the sum of its proper divisors (165841581068748).

221121020101012 is a wasteful number, since it uses less digits than its factorization.

221121020101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116570430 (or 116570428 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121020101012 its reverse (210101020121122), we get a palindrome (431222040222134).

The spelling of 221121020101012 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty million, one hundred one thousand, twelve".