100112261221 has 4 divisors (see below), whose sum is σ = 114414012832. Its totient is φ = 85810509612.

The previous prime is 100112261219. The next prime is 100112261237. The reversal of 100112261221 is 122162211001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122162211001 = 39937 ⋅3058873.

It is a cyclic number.

It is not a de Polignac number, because 100112261221 - 2¹ = 100112261219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100112261021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150875795 + ... + 7150875808.

It is an arithmetic number, because the mean of its divisors is an integer number (28603503208).

Almost surely, 2^100112261221 is an apocalyptic number.

It is an amenable number.

100112261221 is a deficient number, since it is larger than the sum of its proper divisors (14301751611).

100112261221 is an equidigital number, since it uses as much as digits as its factorization.

100112261221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301751610.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 100112261221 its reverse (122162211001), we get a palindrome (222274472222).

The spelling of 100112261221 in words is "one hundred billion, one hundred twelve million, two hundred sixty-one thousand, two hundred twenty-one".