121221413104 has 40 divisors (see below), whose sum is σ = 258568651440. Its totient is φ = 54595123200.

The previous prime is 121221413101. The next prime is 121221413147. The reversal of 121221413104 is 401314122121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221413101) 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, 3140257 + ... + 3178624.

It is an arithmetic number, because the mean of its divisors is an integer number (6464216286).

Almost surely, 2^121221413104 is an apocalyptic number.

It is an amenable number.

121221413104 is an abundant number, since it is smaller than the sum of its proper divisors (137347238336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221413104 is a wasteful number, since it uses less digits than its factorization.

121221413104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319009 (or 6319003 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121221413104 its reverse (401314122121), we get a palindrome (522535535225).

The spelling of 121221413104 in words is "one hundred twenty-one billion, two hundred twenty-one million, four hundred thirteen thousand, one hundred four".