1021012012111 has 48 divisors (see below), whose sum is σ = 1303851880800. Its totient is φ = 792197183232.

The previous prime is 1021012012079. The next prime is 1021012012117. The reversal of 1021012012111 is 1112102101201.

It is a happy number.

It is not a de Polignac number, because 1021012012111 - 2⁵ = 1021012012079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1021012012091 and 1021012012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021012012117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80648700 + ... + 80661358.

It is an arithmetic number, because the mean of its divisors is an integer number (27163580850).

Almost surely, 2^{1021012012111} is an apocalyptic number.

1021012012111 is a deficient number, since it is larger than the sum of its proper divisors (282839868689).

1021012012111 is a wasteful number, since it uses less digits than its factorization.

1021012012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128 (or 15121 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021012012111 its reverse (1112102101201), we get a palindrome (2133114113312).

The spelling of 1021012012111 in words is "one trillion, twenty-one billion, twelve million, twelve thousand, one hundred eleven".