121001011021 has 8 divisors (see below), whose sum is σ = 132289951104. Its totient is φ = 109760212320.

The previous prime is 121001010967. The next prime is 121001011057. The reversal of 121001011021 is 120110100121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121001011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001010989 and 121001011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001014021) 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, 12030085 + ... + 12040138.

It is an arithmetic number, because the mean of its divisors is an integer number (16536243888).

Almost surely, 2^121001011021 is an apocalyptic number.

121001011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121001011021 is a deficient number, since it is larger than the sum of its proper divisors (11288940083).

121001011021 is a wasteful number, since it uses less digits than its factorization.

121001011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24070691.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121001011021 its reverse (120110100121), we get a palindrome (241111111142).

The spelling of 121001011021 in words is "one hundred twenty-one billion, one million, eleven thousand, twenty-one".