221211111012002 has 4 divisors (see below), whose sum is σ = 331816666518006. Its totient is φ = 110605555506000.

The previous prime is 221211111011899. The next prime is 221211111012013. The reversal of 221211111012002 is 200210111112122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 214717120126441 + 6493990885561 = 14653229^2 + 2548331^2 .

It is a super-3 number, since 3×221211111012002³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302777752999 + ... + 55302777753002.

Almost surely, 2^{221211111012002} is an apocalyptic number.

221211111012002 is a deficient number, since it is larger than the sum of its proper divisors (110605555506004).

221211111012002 is a wasteful number, since it uses less digits than its factorization.

221211111012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110605555506003.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221211111012002 its reverse (200210111112122), we get a palindrome (421421222124124).

The spelling of 221211111012002 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, twelve thousand, two".