2021067010661 has 8 divisors (see below), whose sum is σ = 2032319345784. Its totient is φ = 2009815623360.

The previous prime is 2021067010657. The next prime is 2021067010663. The reversal of 2021067010661 is 1660107601202.

It can be written as a sum of positive squares in 4 ways, for example, as 12699036100 + 2008367974561 = 112690^2 + 1417169^2 .

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 2021067010661 - 2² = 2021067010657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021067010663) 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, 4278311 + ... + 4727163.

It is an arithmetic number, because the mean of its divisors is an integer number (254039918223).

Almost surely, 2^{2021067010661} is an apocalyptic number.

It is an amenable number.

2021067010661 is a deficient number, since it is larger than the sum of its proper divisors (11252335123).

2021067010661 is a wasteful number, since it uses less digits than its factorization.

2021067010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473911.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 2021067010661 in words is "two trillion, twenty-one billion, sixty-seven million, ten thousand, six hundred sixty-one".