10111001220021 has 32 divisors (see below), whose sum is σ = 14764260026880. Its totient is φ = 6116878310400.

The previous prime is 10111001220013. The next prime is 10111001220041. The reversal of 10111001220021 is 12002210011101.

It is not a de Polignac number, because 10111001220021 - 2³ = 10111001220013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111001219979 and 10111001220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111001220011) 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, 3315325 + ... + 5586893.

It is an arithmetic number, because the mean of its divisors is an integer number (461383125840).

Almost surely, 2^{10111001220021} is an apocalyptic number.

It is an amenable number.

10111001220021 is a deficient number, since it is larger than the sum of its proper divisors (4653258806859).

10111001220021 is a wasteful number, since it uses less digits than its factorization.

10111001220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273517.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111001220021 its reverse (12002210011101), we get a palindrome (22113211231122).

The spelling of 10111001220021 in words is "ten trillion, one hundred eleven billion, one million, two hundred twenty thousand, twenty-one".