1012201111021 has 16 divisors (see below), whose sum is σ = 1023396171840. Its totient is φ = 1001075708160.

The previous prime is 1012201111013. The next prime is 1012201111037. The reversal of 1012201111021 is 1201111022101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012201111021 - 2³ = 1012201111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012201110992 and 1012201111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012201111001) 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, 38616106 + ... + 38642308.

It is an arithmetic number, because the mean of its divisors is an integer number (63962260740).

Almost surely, 2^{1012201111021} is an apocalyptic number.

It is an amenable number.

1012201111021 is a deficient number, since it is larger than the sum of its proper divisors (11195060819).

1012201111021 is a wasteful number, since it uses less digits than its factorization.

1012201111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27516.

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

Adding to 1012201111021 its reverse (1201111022101), we get a palindrome (2213312133122).

The spelling of 1012201111021 in words is "one trillion, twelve billion, two hundred one million, one hundred eleven thousand, twenty-one".