1243211101 has 8 divisors (see below), whose sum is σ = 1372571424. Its totient is φ = 1116574320.

The previous prime is 1243211093. The next prime is 1243211117. The reversal of 1243211101 is 1011123421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243211101 - 2³ = 1243211093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243211131) 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, 679926 + ... + 681751.

It is an arithmetic number, because the mean of its divisors is an integer number (171571428).

Almost surely, 2^1243211101 is an apocalyptic number.

1243211101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243211101 is a deficient number, since it is larger than the sum of its proper divisors (129360323).

1243211101 is a wasteful number, since it uses less digits than its factorization.

1243211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361771.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1243211101 is about 35259.1988139266. The cubic root of 1243211101 is about 1075.2636385296.

Adding to 1243211101 its reverse (1011123421), we get a palindrome (2254334522).

The spelling of 1243211101 in words is "one billion, two hundred forty-three million, two hundred eleven thousand, one hundred one".