10102012221 has 64 divisors (see below), whose sum is σ = 16895692800. Its totient is φ = 5234912256.

The previous prime is 10102012211. The next prime is 10102012241. The reversal of 10102012221 is 12221020101.

It is not a de Polignac number, because 10102012221 - 2⁶ = 10102012157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10102012197 and 10102012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102012201) 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, 8685586 + ... + 8686748.

It is an arithmetic number, because the mean of its divisors is an integer number (263995200).

Almost surely, 2^10102012221 is an apocalyptic number.

It is an amenable number.

10102012221 is a deficient number, since it is larger than the sum of its proper divisors (6793680579).

10102012221 is a wasteful number, since it uses less digits than its factorization.

10102012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058.

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

Adding to 10102012221 its reverse (12221020101), we get a palindrome (22323032322).

The spelling of 10102012221 in words is "ten billion, one hundred two million, twelve thousand, two hundred twenty-one".