121201201021 has 8 divisors (see below), whose sum is σ = 129072482424. Its totient is φ = 113412341760.

The previous prime is 121201201019. The next prime is 121201201063. The reversal of 121201201021 is 120102102121.

It can be written as a sum of positive squares in 4 ways, for example, as 53229411225 + 67971789796 = 230715^2 + 260714^2 .

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 121201201021 - 2¹ = 121201201019 is a prime.

It is a super-2 number, since 2×121201201021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121201200992 and 121201201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201201721) 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, 20602500 + ... + 20608381.

It is an arithmetic number, because the mean of its divisors is an integer number (16134060303).

Almost surely, 2^121201201021 is an apocalyptic number.

It is an amenable number.

121201201021 is a deficient number, since it is larger than the sum of its proper divisors (7871281403).

121201201021 is a wasteful number, since it uses less digits than its factorization.

121201201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41211071.

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

Adding to 121201201021 its reverse (120102102121), we get a palindrome (241303303142).

The spelling of 121201201021 in words is "one hundred twenty-one billion, two hundred one million, two hundred one thousand, twenty-one".