2011500125021 has 4 divisors (see below), whose sum is σ = 2036962152000. Its totient is φ = 1986038098044.

The previous prime is 2011500125003. The next prime is 2011500125029. The reversal of 2011500125021 is 1205210051102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011500125021 - 2¹⁸ = 2011499862877 is a prime.

It is a super-2 number, since 2×2011500125021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011500124984 and 2011500125002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011500125029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12731013371 + ... + 12731013528.

It is an arithmetic number, because the mean of its divisors is an integer number (509240538000).

Almost surely, 2^{2011500125021} is an apocalyptic number.

It is an amenable number.

2011500125021 is a deficient number, since it is larger than the sum of its proper divisors (25462026979).

2011500125021 is an equidigital number, since it uses as much as digits as its factorization.

2011500125021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25462026978.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 2011500125021 its reverse (1205210051102), we get a palindrome (3216710176123).

The spelling of 2011500125021 in words is "two trillion, eleven billion, five hundred million, one hundred twenty-five thousand, twenty-one".