2121015543201 has 12 divisors (see below), whose sum is σ = 3083978451840. Its totient is φ = 1404646054200.

The previous prime is 2121015543131. The next prime is 2121015543211. The reversal of 2121015543201 is 1023455101212.

It is a happy number.

2121015543201 is a `hidden beast` number, since 2 + 1 + 2 + 101 + 554 + 3 + 2 + 0 + 1 = 666.

It is not a de Polignac number, because 2121015543201 - 2¹¹ = 2121015541153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121015543211) 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, 780357561 + ... + 780360278.

It is an arithmetic number, because the mean of its divisors is an integer number (256998204320).

Almost surely, 2^{2121015543201} is an apocalyptic number.

It is an amenable number.

2121015543201 is a deficient number, since it is larger than the sum of its proper divisors (962962908639).

2121015543201 is a wasteful number, since it uses less digits than its factorization.

2121015543201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560717996 (or 1560717993 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 2121015543201 in words is "two trillion, one hundred twenty-one billion, fifteen million, five hundred forty-three thousand, two hundred one".