2067011621721 has 6 divisors (see below), whose sum is σ = 2985683453610. Its totient is φ = 1378007747808.

The previous prime is 2067011621711. The next prime is 2067011621833. The reversal of 2067011621721 is 1271261107602.

2067011621721 is a `hidden beast` number, since 2 + 0 + 6 + 7 + 0 + 1 + 1 + 621 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1140220331721 + 926791290000 = 1067811^2 + 962700^2 .

It is not a de Polignac number, because 2067011621721 - 2¹⁰ = 2067011620697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2067011621711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114833978976 + ... + 114833978993.

It is an arithmetic number, because the mean of its divisors is an integer number (497613908935).

Almost surely, 2^{2067011621721} is an apocalyptic number.

It is an amenable number.

2067011621721 is a deficient number, since it is larger than the sum of its proper divisors (918671831889).

2067011621721 is a wasteful number, since it uses less digits than its factorization.

2067011621721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229667957975 (or 229667957972 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 2067011621721 in words is "two trillion, sixty-seven billion, eleven million, six hundred twenty-one thousand, seven hundred twenty-one".