1001212210111 has 8 divisors (see below), whose sum is σ = 1051152647040. Its totient is φ = 951805895832.

The previous prime is 1001212210099. The next prime is 1001212210171. The reversal of 1001212210111 is 1110122121001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001212210111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001212210091 and 1001212210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001212210171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133526821 + ... + 133534318.

It is an arithmetic number, because the mean of its divisors is an integer number (131394080880).

Almost surely, 2^{1001212210111} is an apocalyptic number.

1001212210111 is a deficient number, since it is larger than the sum of its proper divisors (49940436929).

1001212210111 is a wasteful number, since it uses less digits than its factorization.

1001212210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267061325.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001212210111 its reverse (1110122121001), we get a palindrome (2111334331112).

The spelling of 1001212210111 in words is "one trillion, one billion, two hundred twelve million, two hundred ten thousand, one hundred eleven".