121201011021 has 8 divisors (see below), whose sum is σ = 161966138400. Its totient is φ = 80618278832.

The previous prime is 121201011017. The next prime is 121201011031. The reversal of 121201011021 is 120110102121.

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 121201011021 - 2² = 121201011017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201010988 and 121201011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201011031) 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, 45597246 + ... + 45599903.

It is an arithmetic number, because the mean of its divisors is an integer number (20245767300).

Almost surely, 2^121201011021 is an apocalyptic number.

It is an amenable number.

121201011021 is a deficient number, since it is larger than the sum of its proper divisors (40765127379).

121201011021 is an equidigital number, since it uses as much as digits as its factorization.

121201011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91197595.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121201011021 its reverse (120110102121), we get a palindrome (241311113142).

The spelling of 121201011021 in words is "one hundred twenty-one billion, two hundred one million, eleven thousand, twenty-one".