121120200021 has 8 divisors (see below), whose sum is σ = 161585416960. Its totient is φ = 80700891552.

The previous prime is 121120200017. The next prime is 121120200041. The reversal of 121120200021 is 120002021121.

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

It is not a de Polignac number, because 121120200021 - 2² = 121120200017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120200041) 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, 11470960 + ... + 11481513.

It is an arithmetic number, because the mean of its divisors is an integer number (20198177120).

Almost surely, 2^121120200021 is an apocalyptic number.

It is an amenable number.

121120200021 is a deficient number, since it is larger than the sum of its proper divisors (40465216939).

121120200021 is a wasteful number, since it uses less digits than its factorization.

121120200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22954235.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121120200021 its reverse (120002021121), we get a palindrome (241122221142).

The spelling of 121120200021 in words is "one hundred twenty-one billion, one hundred twenty million, two hundred thousand, twenty-one".