1212001121101 has 4 divisors (see below), whose sum is σ = 1213886037952. Its totient is φ = 1210116204252.

The previous prime is 1212001121099. The next prime is 1212001121113. The reversal of 1212001121101 is 1011211002121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212001121101 - 2¹ = 1212001121099 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 (1212001121131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942457461 + ... + 942458746.

It is an arithmetic number, because the mean of its divisors is an integer number (303471509488).

Almost surely, 2^{1212001121101} is an apocalyptic number.

It is an amenable number.

1212001121101 is a deficient number, since it is larger than the sum of its proper divisors (1884916851).

1212001121101 is an equidigital number, since it uses as much as digits as its factorization.

1212001121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884916850.

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

Adding to 1212001121101 its reverse (1011211002121), we get a palindrome (2223212123222).

The spelling of 1212001121101 in words is "one trillion, two hundred twelve billion, one million, one hundred twenty-one thousand, one hundred one".