35121405221 has 16 divisors (see below), whose sum is σ = 42785107200. Its totient is φ = 28143064320.

The previous prime is 35121405217. The next prime is 35121405223. The reversal of 35121405221 is 12250412153.

It is not a de Polignac number, because 35121405221 - 2² = 35121405217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35121405223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972665 + ... + 1008126.

It is an arithmetic number, because the mean of its divisors is an integer number (2674069200).

Almost surely, 2^35121405221 is an apocalyptic number.

It is an amenable number.

35121405221 is a deficient number, since it is larger than the sum of its proper divisors (7663701979).

35121405221 is a wasteful number, since it uses less digits than its factorization.

35121405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980964.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 35121405221 its reverse (12250412153), we get a palindrome (47371817374).

The spelling of 35121405221 in words is "thirty-five billion, one hundred twenty-one million, four hundred five thousand, two hundred twenty-one".