2011889227951 has 16 divisors (see below), whose sum is σ = 2100532500000. Its totient is φ = 1924533426816.

The previous prime is 2011889227891. The next prime is 2011889227961. The reversal of 2011889227951 is 1597229881102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2011889227951 - 2⁷ = 2011889227823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011889227892 and 2011889227901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011889227961) 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, 59596425 + ... + 59630173.

It is an arithmetic number, because the mean of its divisors is an integer number (131283281250).

Almost surely, 2^{2011889227951} is an apocalyptic number.

2011889227951 is a deficient number, since it is larger than the sum of its proper divisors (88643272049).

2011889227951 is a wasteful number, since it uses less digits than its factorization.

2011889227951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52746.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 2011889227951 in words is "two trillion, eleven billion, eight hundred eighty-nine million, two hundred twenty-seven thousand, nine hundred fifty-one".