2011521122135 has 16 divisors (see below), whose sum is σ = 2853783662400. Its totient is φ = 1331765707776.

The previous prime is 2011521122131. The next prime is 2011521122141. The reversal of 2011521122135 is 5312211251102.

It is not a de Polignac number, because 2011521122135 - 2² = 2011521122131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011521122131) 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, 990896090 + ... + 990898119.

It is an arithmetic number, because the mean of its divisors is an integer number (178361478900).

Almost surely, 2^{2011521122135} is an apocalyptic number.

2011521122135 is a deficient number, since it is larger than the sum of its proper divisors (842262540265).

2011521122135 is a wasteful number, since it uses less digits than its factorization.

2011521122135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981794250.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 2011521122135 its reverse (5312211251102), we get a palindrome (7323732373237).

The spelling of 2011521122135 in words is "two trillion, eleven billion, five hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-five".