1020012111021 has 32 divisors (see below), whose sum is σ = 1452127315968. Its totient is φ = 634647776000.

The previous prime is 1020012111017. The next prime is 1020012111023. The reversal of 1020012111021 is 1201112100201.

It is a cyclic number.

It is not a de Polignac number, because 1020012111021 - 2² = 1020012111017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020012110988 and 1020012111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020012111023) 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, 2730316 + ... + 3081338.

It is an arithmetic number, because the mean of its divisors is an integer number (45378978624).

Almost surely, 2^{1020012111021} is an apocalyptic number.

It is an amenable number.

1020012111021 is a deficient number, since it is larger than the sum of its proper divisors (432115204947).

1020012111021 is a wasteful number, since it uses less digits than its factorization.

1020012111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351521.

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

Adding to 1020012111021 its reverse (1201112100201), we get a palindrome (2221124211222).

The spelling of 1020012111021 in words is "one trillion, twenty billion, twelve million, one hundred eleven thousand, twenty-one".