121122020111021 has 8 divisors (see below), whose sum is σ = 128279370089664. Its totient is φ = 113968284050880.

The previous prime is 121122020110963. The next prime is 121122020111069. The reversal of 121122020111021 is 120111020221121.

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 121122020111021 - 2⁴² = 116723973599917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122020111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903410615 + ... + 903544676.

It is an arithmetic number, because the mean of its divisors is an integer number (16034921261208).

Almost surely, 2^{121122020111021} is an apocalyptic number.

It is an amenable number.

121122020111021 is a deficient number, since it is larger than the sum of its proper divisors (7157349978643).

121122020111021 is a wasteful number, since it uses less digits than its factorization.

121122020111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806959251.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121122020111021 its reverse (120111020221121), we get a palindrome (241233040332142).

The spelling of 121122020111021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, twenty million, one hundred eleven thousand, twenty-one".