21000120101211 has 8 divisors (see below), whose sum is σ = 28069985972304. Its totient is φ = 13965167148800.

The previous prime is 21000120101189. The next prime is 21000120101237. The reversal of 21000120101211 is 11210102100012.

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 21000120101211 - 2⁵ = 21000120101179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000120101111) 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, 8728228266 + ... + 8728230671.

It is an arithmetic number, because the mean of its divisors is an integer number (3508748246538).

Almost surely, 2^{21000120101211} is an apocalyptic number.

21000120101211 is a deficient number, since it is larger than the sum of its proper divisors (7069865871093).

21000120101211 is a wasteful number, since it uses less digits than its factorization.

21000120101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456459341.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21000120101211 its reverse (11210102100012), we get a palindrome (32210222201223).

The spelling of 21000120101211 in words is "twenty-one trillion, one hundred twenty million, one hundred one thousand, two hundred eleven".