121213101021 has 64 divisors (see below), whose sum is σ = 180217529856. Its totient is φ = 72078336000.

The previous prime is 121213101017. The next prime is 121213101071. The reversal of 121213101021 is 120101312121.

It is not a de Polignac number, because 121213101021 - 2² = 121213101017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213101071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67302321 + ... + 67304121.

It is an arithmetic number, because the mean of its divisors is an integer number (2815898904).

Almost surely, 2^121213101021 is an apocalyptic number.

It is an amenable number.

121213101021 is a deficient number, since it is larger than the sum of its proper divisors (59004428835).

121213101021 is a wasteful number, since it uses less digits than its factorization.

121213101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121213101021 its reverse (120101312121), we get a palindrome (241314413142).

The spelling of 121213101021 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred one thousand, twenty-one".