221101012012 has 48 divisors (see below), whose sum is σ = 404048786400. Its totient is φ = 105731619840.

The previous prime is 221101012009. The next prime is 221101012019. The reversal of 221101012012 is 210210101122.

It is a junction number, because it is equal to n+sod(n) for n = 221101011983 and 221101012001.

It is not an unprimeable number, because it can be changed into a prime (221101012019) 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, 28558462 + ... + 28566202.

It is an arithmetic number, because the mean of its divisors is an integer number (8417683050).

Almost surely, 2^221101012012 is an apocalyptic number.

It is an amenable number.

221101012012 is a deficient number, since it is larger than the sum of its proper divisors (182947774388).

221101012012 is a wasteful number, since it uses less digits than its factorization.

221101012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066 (or 10064 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221101012012 its reverse (210210101122), we get a palindrome (431311113134).

The spelling of 221101012012 in words is "two hundred twenty-one billion, one hundred one million, twelve thousand, twelve".