10101121221 has 16 divisors (see below), whose sum is σ = 14198976000. Its totient is φ = 6369771888.

The previous prime is 10101121213. The next prime is 10101121237. The reversal of 10101121221 is 12212110101.

It is not a de Polignac number, because 10101121221 - 2³ = 10101121213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10101121197 and 10101121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101121291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100071 + ... + 173828.

It is an arithmetic number, because the mean of its divisors is an integer number (887436000).

Almost surely, 2^10101121221 is an apocalyptic number.

It is an amenable number.

10101121221 is a deficient number, since it is larger than the sum of its proper divisors (4097854779).

10101121221 is a wasteful number, since it uses less digits than its factorization.

10101121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274568.

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

Adding to 10101121221 its reverse (12212110101), we get a palindrome (22313231322).

The spelling of 10101121221 in words is "ten billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".