1011021111212 has 24 divisors (see below), whose sum is σ = 2042062448160. Its totient is φ = 429004713600.

The previous prime is 1011021111157. The next prime is 1011021111259. The reversal of 1011021111212 is 2121111201101.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178749137 + ... + 178754792.

It is an arithmetic number, because the mean of its divisors is an integer number (85085935340).

Almost surely, 2^{1011021111212} is an apocalyptic number.

It is an amenable number.

1011021111212 is an abundant number, since it is smaller than the sum of its proper divisors (1031041336948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011021111212 is a wasteful number, since it uses less digits than its factorization.

1011021111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357504041 (or 357504039 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011021111212 its reverse (2121111201101), we get a palindrome (3132132312313).

The spelling of 1011021111212 in words is "one trillion, eleven billion, twenty-one million, one hundred eleven thousand, two hundred twelve".