221121312000121 has 16 divisors (see below), whose sum is σ = 245853753320448. Its totient is φ = 197494393982400.

The previous prime is 221121312000107. The next prime is 221121312000143. The reversal of 221121312000121 is 121000213121122.

It is a cyclic number.

It is not a de Polignac number, because 221121312000121 - 2³¹ = 221119164516473 is a prime.

It is a super-3 number, since 3×221121312000121³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (221121312000181) 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, 43898590 + ... + 48675751.

It is an arithmetic number, because the mean of its divisors is an integer number (15365859582528).

Almost surely, 2^{221121312000121} is an apocalyptic number.

It is an amenable number.

221121312000121 is a deficient number, since it is larger than the sum of its proper divisors (24732441320327).

221121312000121 is a wasteful number, since it uses less digits than its factorization.

221121312000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92580312.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 221121312000121 its reverse (121000213121122), we get a palindrome (342121525121243).

The spelling of 221121312000121 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, three hundred twelve million, one hundred twenty-one", and thus it is an aban number.