121212001121021 has 8 divisors (see below), whose sum is σ = 125480581632000. Its totient is φ = 116965827857520.

The previous prime is 121212001121009. The next prime is 121212001121027. The reversal of 121212001121021 is 120121100212121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212001121021 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 (121212001121027) 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, 5601800861 + ... + 5601822498.

It is an arithmetic number, because the mean of its divisors is an integer number (15685072704000).

Almost surely, 2^{121212001121021} is an apocalyptic number.

It is an amenable number.

121212001121021 is a deficient number, since it is larger than the sum of its proper divisors (4268580510979).

121212001121021 is a wasteful number, since it uses less digits than its factorization.

121212001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203623739.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121212001121021 its reverse (120121100212121), we get a palindrome (241333101333142).

The spelling of 121212001121021 in words is "one hundred twenty-one trillion, two hundred twelve billion, one million, one hundred twenty-one thousand, twenty-one".