29121009112 has 128 divisors (see below), whose sum is σ = 65470809600. Its totient is φ = 12012134400.

The previous prime is 29121009107. The next prime is 29121009119. The reversal of 29121009112 is 21190012192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29121009119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3122937 + ... + 3132247.

It is an arithmetic number, because the mean of its divisors is an integer number (511490700).

Almost surely, 2^29121009112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29121009112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32735404800).

29121009112 is an abundant number, since it is smaller than the sum of its proper divisors (36349800488).

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

29121009112 is a wasteful number, since it uses less digits than its factorization.

29121009112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437 (or 9433 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 29121009112 in words is "twenty-nine billion, one hundred twenty-one million, nine thousand, one hundred twelve".