121110220021 has 32 divisors (see below), whose sum is σ = 144733962240. Its totient is φ = 99158083200.

The previous prime is 121110219983. The next prime is 121110220027. The reversal of 121110220021 is 120022011121.

It is a cyclic number.

It is not a de Polignac number, because 121110220021 - 2¹⁷ = 121110088949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121110219983 and 121110220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11717826 + ... + 11728156.

It is an arithmetic number, because the mean of its divisors is an integer number (4522936320).

Almost surely, 2^121110220021 is an apocalyptic number.

It is an amenable number.

121110220021 is a deficient number, since it is larger than the sum of its proper divisors (23623742219).

121110220021 is a wasteful number, since it uses less digits than its factorization.

121110220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11065.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121110220021 its reverse (120022011121), we get a palindrome (241132231142).

The spelling of 121110220021 in words is "one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, twenty-one".