121214321021 has 4 divisors (see below), whose sum is σ = 121215553344. Its totient is φ = 121213088700.

The previous prime is 121214320979. The next prime is 121214321027. The reversal of 121214321021 is 120123412121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121214321021 - 2¹⁰ = 121214319997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121214320984 and 121214321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121214321027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454475 + ... + 670056.

It is an arithmetic number, because the mean of its divisors is an integer number (30303888336).

Almost surely, 2^121214321021 is an apocalyptic number.

It is an amenable number.

121214321021 is a deficient number, since it is larger than the sum of its proper divisors (1232323).

121214321021 is a wasteful number, since it uses less digits than its factorization.

121214321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232322.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121214321021 its reverse (120123412121), we get a palindrome (241337733142).

The spelling of 121214321021 in words is "one hundred twenty-one billion, two hundred fourteen million, three hundred twenty-one thousand, twenty-one".