1012000220021 has 32 divisors (see below), whose sum is σ = 1172633552640. Its totient is φ = 855437299200.

The previous prime is 1012000219957. The next prime is 1012000220027. The reversal of 1012000220021 is 1200220002101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012000220021 - 2⁶ = 1012000219957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012000219984 and 1012000220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012000220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 622003010 + ... + 622004636.

It is an arithmetic number, because the mean of its divisors is an integer number (36644798520).

Almost surely, 2^{1012000220021} is an apocalyptic number.

It is an amenable number.

1012000220021 is a deficient number, since it is larger than the sum of its proper divisors (160633332619).

1012000220021 is a wasteful number, since it uses less digits than its factorization.

1012000220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1012000220021 its reverse (1200220002101), we get a palindrome (2212220222122).

The spelling of 1012000220021 in words is "one trillion, twelve billion, two hundred twenty thousand, twenty-one".