1012011120021 has 16 divisors (see below), whose sum is σ = 1549490711040. Its totient is φ = 581059015920.

The previous prime is 1012011120019. The next prime is 1012011120149. The reversal of 1012011120021 is 1200211102101.

It is not a de Polignac number, because 1012011120021 - 2¹ = 1012011120019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012011119979 and 1012011120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012011120721) 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, 807025785 + ... + 807027038.

It is an arithmetic number, because the mean of its divisors is an integer number (96843169440).

Almost surely, 2^{1012011120021} is an apocalyptic number.

1012011120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012011120021 is a deficient number, since it is larger than the sum of its proper divisors (537479591019).

1012011120021 is a wasteful number, since it uses less digits than its factorization.

1012011120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614052856.

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

Adding to 1012011120021 its reverse (1200211102101), we get a palindrome (2212222222122).

The spelling of 1012011120021 in words is "one trillion, twelve billion, eleven million, one hundred twenty thousand, twenty-one".