221012100121122 has 24 divisors (see below), whose sum is σ = 479365209803376. Its totient is φ = 73592906264856.

The previous prime is 221012100121097. The next prime is 221012100121123. The reversal of 221012100121122 is 221121001210122.

221012100121122 is a `hidden beast` number, since 2 + 210 + 1 + 210 + 0 + 121 + 122 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 221012100121095 and 221012100121104.

It is not an unprimeable number, because it can be changed into a prime (221012100121123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6482797108 + ... + 6482831199.

It is an arithmetic number, because the mean of its divisors is an integer number (19973550408474).

Almost surely, 2^{221012100121122} is an apocalyptic number.

221012100121122 is an abundant number, since it is smaller than the sum of its proper divisors (258353109682254).

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

221012100121122 is a wasteful number, since it uses less digits than its factorization.

221012100121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965629262 (or 12965629259 counting only the distinct ones).

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

Adding to 221012100121122 its reverse (221121001210122), we get a palindrome (442133101331244).

The spelling of 221012100121122 in words is "two hundred twenty-one trillion, twelve billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-two".