101021221121 has 4 divisors (see below), whose sum is σ = 101131147200. Its totient is φ = 100911295044.

The previous prime is 101021221117. The next prime is 101021221123. The reversal of 101021221121 is 121122120101.

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.

It is a cyclic number.

It is not a de Polignac number, because 101021221121 - 2² = 101021221117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101021221096 and 101021221105.

It is not an unprimeable number, because it can be changed into a prime (101021221123) 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, 54961661 + ... + 54963498.

It is an arithmetic number, because the mean of its divisors is an integer number (25282786800).

Almost surely, 2^101021221121 is an apocalyptic number.

It is an amenable number.

101021221121 is a deficient number, since it is larger than the sum of its proper divisors (109926079).

101021221121 is an equidigital number, since it uses as much as digits as its factorization.

101021221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109926078.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101021221121 its reverse (121122120101), we get a palindrome (222143341222).

The spelling of 101021221121 in words is "one hundred one billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".