1212121012101 has 16 divisors (see below), whose sum is σ = 1639011811968. Its totient is φ = 796656660800.

The previous prime is 1212121012057. The next prime is 1212121012103. The reversal of 1212121012101 is 1012101212121.

It is a happy number.

1212121012101 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 1212121012101 - 2⁷ = 1212121011973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212121012103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4122355 + ... + 4406591.

It is an arithmetic number, because the mean of its divisors is an integer number (102438238248).

Almost surely, 2^{1212121012101} is an apocalyptic number.

It is an amenable number.

1212121012101 is a deficient number, since it is larger than the sum of its proper divisors (426890799867).

1212121012101 is a wasteful number, since it uses less digits than its factorization.

1212121012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304332.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212121012101 its reverse (1012101212121), we get a palindrome (2224222224222).

The spelling of 1212121012101 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred one".