1213121231101 has 8 divisors (see below), whose sum is σ = 1322178469920. Its totient is φ = 1106312595312.

The previous prime is 1213121231087. The next prime is 1213121231143. The reversal of 1213121231101 is 1011321213121.

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 1213121231101 - 2¹⁷ = 1213121100029 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 (1213121237101) 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, 562149631 + ... + 562151788.

It is an arithmetic number, because the mean of its divisors is an integer number (165272308740).

Almost surely, 2^{1213121231101} is an apocalyptic number.

It is an amenable number.

1213121231101 is a deficient number, since it is larger than the sum of its proper divisors (109057238819).

1213121231101 is a wasteful number, since it uses less digits than its factorization.

1213121231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124301515.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1213121231101 its reverse (1011321213121), we get a palindrome (2224442444222).

The spelling of 1213121231101 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred one".