29121245913 has 4 divisors (see below), whose sum is σ = 38828327888. Its totient is φ = 19414163940.

The previous prime is 29121245891. The next prime is 29121245927. The reversal of 29121245913 is 31954212192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 29121245913 - 2¹⁸ = 29120983769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29121240913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4853540983 + ... + 4853540988.

It is an arithmetic number, because the mean of its divisors is an integer number (9707081972).

Almost surely, 2^29121245913 is an apocalyptic number.

It is an amenable number.

29121245913 is a deficient number, since it is larger than the sum of its proper divisors (9707081975).

29121245913 is an equidigital number, since it uses as much as digits as its factorization.

29121245913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9707081974.

The product of its digits is 38880, while the sum is 39.

The spelling of 29121245913 in words is "twenty-nine billion, one hundred twenty-one million, two hundred forty-five thousand, nine hundred thirteen".