1020021111021 has 16 divisors (see below), whose sum is σ = 1498356848448. Its totient is φ = 612073872000.

The previous prime is 1020021110981. The next prime is 1020021111023. The reversal of 1020021111021 is 1201111200201.

It is not a de Polignac number, because 1020021111021 - 2²⁶ = 1019954002157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020021110988 and 1020021111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021111023) 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, 153015136 + ... + 153021801.

It is an arithmetic number, because the mean of its divisors is an integer number (93647303028).

Almost surely, 2^{1020021111021} is an apocalyptic number.

1020021111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020021111021 is a deficient number, since it is larger than the sum of its proper divisors (478335737427).

1020021111021 is a wasteful number, since it uses less digits than its factorization.

1020021111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306037052.

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

Adding to 1020021111021 its reverse (1201111200201), we get a palindrome (2221132311222).

The spelling of 1020021111021 in words is "one trillion, twenty billion, twenty-one million, one hundred eleven thousand, twenty-one".