221212453536231 has 16 divisors (see below), whose sum is σ = 296352936334080. Its totient is φ = 146775130236800.

The previous prime is 221212453536197. The next prime is 221212453536241. The reversal of 221212453536231 is 132635354212122.

It is a cyclic number.

It is not a de Polignac number, because 221212453536231 - 2¹³ = 221212453528039 is a prime.

It is a super-2 number, since 2×221212453536231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212453536241) 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, 207011091 + ... + 208076948.

It is an arithmetic number, because the mean of its divisors is an integer number (18522058520880).

Almost surely, 2^{221212453536231} is an apocalyptic number.

221212453536231 is a deficient number, since it is larger than the sum of its proper divisors (75140482797849).

221212453536231 is a wasteful number, since it uses less digits than its factorization.

221212453536231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415088886.

The product of its digits is 518400, while the sum is 42.

The spelling of 221212453536231 in words is "two hundred twenty-one trillion, two hundred twelve billion, four hundred fifty-three million, five hundred thirty-six thousand, two hundred thirty-one".