121222100021 has 8 divisors (see below), whose sum is σ = 133193676000. Its totient is φ = 109409088240.

The previous prime is 121222099997. The next prime is 121222100029. The reversal of 121222100021 is 120001222121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121222100021 - 2³⁴ = 104042230837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121222099969 and 121222100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222100029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39639446 + ... + 39642503.

It is an arithmetic number, because the mean of its divisors is an integer number (16649209500).

Almost surely, 2^121222100021 is an apocalyptic number.

121222100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121222100021 is a deficient number, since it is larger than the sum of its proper divisors (11971575979).

121222100021 is a wasteful number, since it uses less digits than its factorization.

121222100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79282099.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121222100021 its reverse (120001222121), we get a palindrome (241223322142).

The spelling of 121222100021 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, twenty-one".