29142004972421 has 12 divisors (see below), whose sum is σ = 33916363592076. Its totient is φ = 24934335803520.

The previous prime is 29142004972417. The next prime is 29142004972439. The reversal of 29142004972421 is 12427940024192.

It can be written as a sum of positive squares in 2 ways, for example, as 27016864950625 + 2125140021796 = 5197775^2 + 1457786^2 .

It is not a de Polignac number, because 29142004972421 - 2² = 29142004972417 is a prime.

It is a super-2 number, since 2×29142004972421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29142004972621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7083616070 + ... + 7083620183.

It is an arithmetic number, because the mean of its divisors is an integer number (2826363632673).

Almost surely, 2^{29142004972421} is an apocalyptic number.

It is an amenable number.

29142004972421 is a deficient number, since it is larger than the sum of its proper divisors (4774358619655).

29142004972421 is a wasteful number, since it uses less digits than its factorization.

29142004972421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14167236292 (or 14167236281 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 29142004972421 in words is "twenty-nine trillion, one hundred forty-two billion, four million, nine hundred seventy-two thousand, four hundred twenty-one".