221022121101210 has 256 divisors, whose sum is σ = 698155539863040. Its totient is φ = 49459494585600.

The previous prime is 221022121101193. The next prime is 221022121101217. The reversal of 221022121101210 is 12101121220122.

221022121101210 is a `hidden beast` number, since 2 + 21 + 0 + 221 + 211 + 0 + 1 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221022121101217) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18983061 + ... + 28326680.

It is an arithmetic number, because the mean of its divisors is an integer number (2727170077590).

Almost surely, 2^{221022121101210} is an apocalyptic number.

221022121101210 is an abundant number, since it is smaller than the sum of its proper divisors (477133418761830).

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

221022121101210 is a wasteful number, since it uses less digits than its factorization.

221022121101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47309803 (or 47309775 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221022121101210 its reverse (12101121220122), we get a palindrome (233123242321332).

The spelling of 221022121101210 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred ten".