2112521401 has 8 divisors (see below), whose sum is σ = 2174936840. Its totient is φ = 2050386048.

The previous prime is 2112521399. The next prime is 2112521407. The reversal of 2112521401 is 1041252112.

It can be written as a sum of positive squares in 4 ways, for example, as 1233695376 + 878826025 = 35124^2 + 29645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112521401 - 2¹ = 2112521399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112521407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54666 + ... + 84931.

It is an arithmetic number, because the mean of its divisors is an integer number (271867105).

Almost surely, 2^2112521401 is an apocalyptic number.

It is an amenable number.

2112521401 is a deficient number, since it is larger than the sum of its proper divisors (62415439).

2112521401 is a wasteful number, since it uses less digits than its factorization.

2112521401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140043.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2112521401 is about 45962.1735887240. The cubic root of 2112521401 is about 1283.1193048519.

Adding to 2112521401 its reverse (1041252112), we get a palindrome (3153773513).

The spelling of 2112521401 in words is "two billion, one hundred twelve million, five hundred twenty-one thousand, four hundred one".