221012101012021 has 32 divisors (see below), whose sum is σ = 259005489684480. Its totient is φ = 186609855230400.

The previous prime is 221012101012019. The next prime is 221012101012037. The reversal of 221012101012021 is 120210101210122.

It is a cyclic number.

It is not a de Polignac number, because 221012101012021 - 2¹ = 221012101012019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221012101011986 and 221012101012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012101012721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65262571 + ... + 68565496.

It is an arithmetic number, because the mean of its divisors is an integer number (8093921552640).

Almost surely, 2^{221012101012021} is an apocalyptic number.

It is an amenable number.

221012101012021 is a deficient number, since it is larger than the sum of its proper divisors (37993388672459).

221012101012021 is a wasteful number, since it uses less digits than its factorization.

221012101012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133828305.

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

Adding to 221012101012021 its reverse (120210101210122), we get a palindrome (341222202222143).

The spelling of 221012101012021 in words is "two hundred twenty-one trillion, twelve billion, one hundred one million, twelve thousand, twenty-one".