1012200111021 has 16 divisors (see below), whose sum is σ = 1472605954560. Its totient is φ = 613323411120.

The previous prime is 1012200111019. The next prime is 1012200111031. The reversal of 1012200111021 is 1201110022101.

It is not a de Polignac number, because 1012200111021 - 2¹ = 1012200111019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012200110988 and 1012200111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012200111031) 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, 3123295 + ... + 3432108.

It is an arithmetic number, because the mean of its divisors is an integer number (92037872160).

Almost surely, 2^{1012200111021} is an apocalyptic number.

1012200111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012200111021 is a deficient number, since it is larger than the sum of its proper divisors (460405843539).

1012200111021 is a wasteful number, since it uses less digits than its factorization.

1012200111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560096.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1012200111021 its reverse (1201110022101), we get a palindrome (2213310133122).

The spelling of 1012200111021 in words is "one trillion, twelve billion, two hundred million, one hundred eleven thousand, twenty-one".