221011111101012 has 24 divisors (see below), whose sum is σ = 515712721017312. Its totient is φ = 73667494874400.

The previous prime is 221011111101007. The next prime is 221011111101073. The reversal of 221011111101012 is 210101111110122.

It is a super-2 number, since 2×221011111101012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221011111100982 and 221011111101000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359116314 + ... + 359731217.

It is an arithmetic number, because the mean of its divisors is an integer number (21488030042388).

Almost surely, 2^{221011111101012} is an apocalyptic number.

It is an amenable number.

221011111101012 is an abundant number, since it is smaller than the sum of its proper divisors (294701609916300).

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

221011111101012 is a wasteful number, since it uses less digits than its factorization.

221011111101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718873159 (or 718873157 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221011111101012 its reverse (210101111110122), we get a palindrome (431112222211134).

The spelling of 221011111101012 in words is "two hundred twenty-one trillion, eleven billion, one hundred eleven million, one hundred one thousand, twelve".