1012011212121 has 64 divisors (see below), whose sum is σ = 1719864921600. Its totient is φ = 514842402816.

The previous prime is 1012011212111. The next prime is 1012011212137. The reversal of 1012011212121 is 1212121102101.

It is a happy number.

1012011212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1012011212121 - 2¹¹ = 1012011210073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012011212121.

It is not an unprimeable number, because it can be changed into a prime (1012011212111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7286095 + ... + 7423691.

It is an arithmetic number, because the mean of its divisors is an integer number (26872889400).

Almost surely, 2^{1012011212121} is an apocalyptic number.

It is an amenable number.

1012011212121 is a deficient number, since it is larger than the sum of its proper divisors (707853709479).

1012011212121 is a wasteful number, since it uses less digits than its factorization.

1012011212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138578.

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

Adding to 1012011212121 its reverse (1212121102101), we get a palindrome (2224132314222).

The spelling of 1012011212121 in words is "one trillion, twelve billion, eleven million, two hundred twelve thousand, one hundred twenty-one".