4131220121400 has 96 divisors (see below), whose sum is σ = 12807236913840. Its totient is φ = 1101619599360.

The previous prime is 4131220121387. The next prime is 4131220121407. The reversal of 4131220121400 is 41210221314.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4131220121407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19392262 + ... + 19604138.

Almost surely, 2^{4131220121400} is an apocalyptic number.

4131220121400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4131220121400 is an abundant number, since it is smaller than the sum of its proper divisors (8676016792440).

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

4131220121400 is a wasteful number, since it uses less digits than its factorization.

4131220121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244393 (or 244384 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 4131220121400 its reverse (41210221314), we get a palindrome (4172430342714).

The spelling of 4131220121400 in words is "four trillion, one hundred thirty-one billion, two hundred twenty million, one hundred twenty-one thousand, four hundred".