1012100002221 has 64 divisors (see below), whose sum is σ = 1715097784320. Its totient is φ = 515574858240.

The previous prime is 1012100002219. The next prime is 1012100002231. The reversal of 1012100002221 is 1222000012101.

It is not a de Polignac number, because 1012100002221 - 2¹ = 1012100002219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012100002197 and 1012100002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012100002231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24379560 + ... + 24421038.

It is an arithmetic number, because the mean of its divisors is an integer number (26798402880).

Almost surely, 2^{1012100002221} is an apocalyptic number.

1012100002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012100002221 is a deficient number, since it is larger than the sum of its proper divisors (702997782099).

1012100002221 is a wasteful number, since it uses less digits than its factorization.

1012100002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43546.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1012100002221 its reverse (1222000012101), we get a palindrome (2234100014322).

The spelling of 1012100002221 in words is "one trillion, twelve billion, one hundred million, two thousand, two hundred twenty-one".