221012111001331 has 16 divisors (see below), whose sum is σ = 252159230814624. Its totient is φ = 191899724834304.

The previous prime is 221012111001271. The next prime is 221012111001379. The reversal of 221012111001331 is 133100111210122.

It is a cyclic number.

It is not a de Polignac number, because 221012111001331 - 2¹⁵ = 221012110968563 is a prime.

It is a super-2 number, since 2×221012111001331² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221012111001299 and 221012111001308.

It is not an unprimeable number, because it can be changed into a prime (221012111001631) 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, 288149841 + ... + 288915826.

It is an arithmetic number, because the mean of its divisors is an integer number (15759951925914).

Almost surely, 2^{221012111001331} is an apocalyptic number.

221012111001331 is a deficient number, since it is larger than the sum of its proper divisors (31147119813293).

221012111001331 is a wasteful number, since it uses less digits than its factorization.

221012111001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577067430.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 221012111001331 its reverse (133100111210122), we get a palindrome (354112222211453).

The spelling of 221012111001331 in words is "two hundred twenty-one trillion, twelve billion, one hundred eleven million, one thousand, three hundred thirty-one".