1011021120021 has 32 divisors (see below), whose sum is σ = 1496683699200. Its totient is φ = 601912903680.

The previous prime is 1011021119993. The next prime is 1011021120073. The reversal of 1011021120021 is 1200211201101.

It is not a de Polignac number, because 1011021120021 - 2⁶ = 1011021119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011021119979 and 1011021120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021120121) 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, 156885 + ... + 1430613.

It is an arithmetic number, because the mean of its divisors is an integer number (46771365600).

Almost surely, 2^{1011021120021} is an apocalyptic number.

1011021120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011021120021 is a deficient number, since it is larger than the sum of its proper divisors (485662579179).

1011021120021 is a wasteful number, since it uses less digits than its factorization.

1011021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274169.

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

Adding to 1011021120021 its reverse (1200211201101), we get a palindrome (2211232321122).

The spelling of 1011021120021 in words is "one trillion, eleven billion, twenty-one million, one hundred twenty thousand, twenty-one".