29673852121 has 9 divisors (see below), whose sum is σ = 31525161661. Its totient is φ = 27925575232.

The previous prime is 29673852113. The next prime is 29673852137. The reversal of 29673852121 is 12125837692.

The square root of 29673852121 is 172261.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10012203721 + 19661648400 = 100061^2 + 140220^2 .

It is not a de Polignac number, because 29673852121 - 2³ = 29673852113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29673852151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2923371 + ... + 2933503.

Almost surely, 2^29673852121 is an apocalyptic number.

29673852121 is the 172261-st square number.

29673852121 is the 86131-st centered octagonal number.

It is an amenable number.

29673852121 is a deficient number, since it is larger than the sum of its proper divisors (1851309540).

29673852121 is an frugal number, since it uses more digits than its factorization.

29673852121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20300 (or 10150 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 29673852121 in words is "twenty-nine billion, six hundred seventy-three million, eight hundred fifty-two thousand, one hundred twenty-one".