101121112221 has 16 divisors (see below), whose sum is σ = 139899716544. Its totient is φ = 64915858944.

The previous prime is 101121112217. The next prime is 101121112249. The reversal of 101121112221 is 122211121101.

It is a happy number.

It is not a de Polignac number, because 101121112221 - 2² = 101121112217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101121112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121112321) 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, 4685115 + ... + 4706648.

It is an arithmetic number, because the mean of its divisors is an integer number (8743732284).

Almost surely, 2^101121112221 is an apocalyptic number.

It is an amenable number.

101121112221 is a deficient number, since it is larger than the sum of its proper divisors (38778604323).

101121112221 is an equidigital number, since it uses as much as digits as its factorization.

101121112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391900.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101121112221 its reverse (122211121101), we get a palindrome (223332233322).

The spelling of 101121112221 in words is "one hundred one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".