21221533514211 has 16 divisors (see below), whose sum is σ = 28672817203200. Its totient is φ = 13959210290688.

The previous prime is 21221533514201. The next prime is 21221533514227. The reversal of 21221533514211 is 11241533512212.

It is not a de Polignac number, because 21221533514211 - 2¹⁵ = 21221533481443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221533514201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29755966 + ... + 30460803.

It is an arithmetic number, because the mean of its divisors is an integer number (1792051075200).

Almost surely, 2^{21221533514211} is an apocalyptic number.

21221533514211 is a deficient number, since it is larger than the sum of its proper divisors (7451283688989).

21221533514211 is a wasteful number, since it uses less digits than its factorization.

21221533514211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60218338.

The product of its digits is 14400, while the sum is 33.

The spelling of 21221533514211 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred thirty-three million, five hundred fourteen thousand, two hundred eleven".