121213021011 has 8 divisors (see below), whose sum is σ = 161622152640. Its totient is φ = 80806285032.

The previous prime is 121213020961. The next prime is 121213021037. The reversal of 121213021011 is 110120312121.

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

It is not a de Polignac number, because 121213021011 - 2¹³ = 121213012819 is a prime.

It is a super-2 number, since 2×121213021011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121213021051) 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, 477325 + ... + 685758.

It is an arithmetic number, because the mean of its divisors is an integer number (20202769080).

Almost surely, 2^121213021011 is an apocalyptic number.

121213021011 is a deficient number, since it is larger than the sum of its proper divisors (40409131629).

121213021011 is a wasteful number, since it uses less digits than its factorization.

121213021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197825.

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

Adding to 121213021011 its reverse (110120312121), we get a palindrome (231333333132).

The spelling of 121213021011 in words is "one hundred twenty-one billion, two hundred thirteen million, twenty-one thousand, eleven".