20011021211000 has 64 divisors (see below), whose sum is σ = 46835057412000. Its totient is φ = 8002824249600.

The previous prime is 20011021210997. The next prime is 20011021211011. The reversal of 20011021211000 is 11212011002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3081236 + ... + 7036764.

Almost surely, 2^{20011021211000} is an apocalyptic number.

20011021211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011021211000 is an abundant number, since it is smaller than the sum of its proper divisors (26824036201000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011021211000 is a wasteful number, since it uses less digits than its factorization.

20011021211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960609 (or 3960595 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011021211000 its reverse (11212011002), we get a palindrome (20022233222002).

The spelling of 20011021211000 in words is "twenty trillion, eleven billion, twenty-one million, two hundred eleven thousand".