20607021211161 has 48 divisors (see below), whose sum is σ = 35089625338560. Its totient is φ = 10636761582720.

The previous prime is 20607021211141. The next prime is 20607021211169. The reversal of 20607021211161 is 16111212070602.

It is not a de Polignac number, because 20607021211161 - 2⁵ = 20607021211129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20607021211169) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40332066 + ... + 40839803.

It is an arithmetic number, because the mean of its divisors is an integer number (731033861220).

Almost surely, 2^{20607021211161} is an apocalyptic number.

20607021211161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20607021211161 is a deficient number, since it is larger than the sum of its proper divisors (14482604127399).

20607021211161 is a wasteful number, since it uses less digits than its factorization.

20607021211161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81172054 (or 81172047 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

Adding to 20607021211161 its reverse (16111212070602), we get a palindrome (36718233281763).

The spelling of 20607021211161 in words is "twenty trillion, six hundred seven billion, twenty-one million, two hundred eleven thousand, one hundred sixty-one".